Head-to-head comparison

GPT-5.6 Luna vs. Gemini 3.8 Flash

Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.

shared result series: 257
distinct benchmarks: 42
latest retrieval: 2026-10-15

First modelSecond model

Specifications

General specifications

Release date, availability, context window, architecture, and published parameter counts at a glance. Undisclosed details remain marked as unavailable.

Specifications for GPT-5.6 Luna and Gemini 3.8 Flash
Attribute	GPT-5.6 Luna	Gemini 3.8 Flash
Provider	OpenAI	Google
Released	Jul 9, 2026	Sep 2, 2026
Availability	Active	Active
Model type	Proprietary	Proprietary
Parameters	Not published	Not published
Architecture	Not published	Not published
Context window	1,050,000 tokens	1,048,576 tokens
Knowledge cutoff	February 16, 2026	March 2026
Technical sources	Model, Context, Knowledge cutoff	Model, Knowledge cutoff

Pricing

API pricing compared

The table compares official standard API rates per 1M tokens, including published cache pricing. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.

API pricing for GPT-5.6 Luna and Gemini 3.8 Flash
Price type	GPT-5.6 Luna	Gemini 3.8 Flash
API input	$0.2 ≤272K / $0.4 >272K	$0.75
API output	$1.2 ≤272K / $1.8 >272K	$3.75
Cache read	$0.02 ≤272K / $0.04 >272K	$0.075
Cache write (5 min.)	$0.25 ≤272K / $0.5 >272K	Not listed
Cache write (1 hr.)	Not listed	Not listed
Price verified	09/22/2026 Source	09/22/2026 Source

GPT-5.6 LunaGemini 3.8 Flash

API inputUSD per 1M tokens, base tier

GPT-5.6 Luna$0.2

Gemini 3.8 Flash$0.75

API outputUSD per 1M tokens, base tier

GPT-5.6 Luna$1.2

Gemini 3.8 Flash$3.75

Cache readUSD per 1M tokens, base tier

GPT-5.6 Luna$0.02

Gemini 3.8 Flash$0.075

Key to the marks:better valuebetter, but not conclusivetie

Pricing by provider

Direct developer pricing and provider endpoint tariffs routed through OpenRouter are listed separately. Prices are in USD per 1M tokens. Context-dependent direct tiers plus regional, Flex, Priority, and other OpenRouter tariffs remain individually identifiable.

Provider pricing for GPT-5.6 Luna and Gemini 3.8 Flash
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
GPT-5.6 Luna	OpenAI	Direct from developerUp to 272,000 context tokens	$0.2	$1.2	Source09/22/2026
	OpenAI	Direct from developerAbove 272,000 context tokens	$0.4	$1.8	Source09/22/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/us-east-1	$0.22	$1.32	Source10/18/2026
	Azure	Via OpenRouterazure	$0.2	$1.2	Source10/18/2026
	Azure	Via OpenRouterazure/eu	$0.22	$1.32	Source10/18/2026
	Azure	Via OpenRouterazure/us	$0.22	$1.32	Source10/18/2026
	OpenAI	Via OpenRouteropenai	$0.2	$1.2	Source10/18/2026
	OpenAI	Via OpenRouteropenai/fast	$0.4	$2.4	Source10/18/2026
	OpenAI	Via OpenRouteropenai/flex	Lowest listed price: $0.1	Lowest listed price: $0.6	Source10/18/2026
Gemini 3.8 Flash	Google	Direct from developerStandard API	$0.75	$3.75	Source09/22/2026
	Google	Via OpenRoutergoogle-vertex/global	$0.75	$3.75	Source10/18/2026
	Google	Via OpenRoutergoogle-vertex/global/flex	Lowest listed price: $0.375	Lowest listed price: $1.875	Source10/18/2026
	Google	Via OpenRoutergoogle-vertex/global/priority	$1.35	$6.75	Source10/18/2026
	Google	Via OpenRoutergoogle-vertex/us	$0.825	$4.125	Source10/18/2026
	Google AI Studio	Via OpenRoutergoogle-ai-studio	$0.75	$3.75	Source10/18/2026
	Google AI Studio	Via OpenRoutergoogle-ai-studio/flex	Lowest listed price: $0.375	Lowest listed price: $1.875	Source10/18/2026
	Google AI Studio	Via OpenRoutergoogle-ai-studio/priority	$1.35	$6.75	Source10/18/2026

Performance

Shared benchmarks

Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.

Capability profile from matched benchmarks

Each axis averages directly matched benchmark families. A value of 100 means the stronger value within this pair, not a universal quality score.

GPT-5.6 Luna

Gemini 3.8 Flash

Coding: 7.7 / 100 (1 benchmark family)

Reasoning: 81 / 99.1 (3 benchmark families)

Knowledge: 0 / 100 (1 benchmark family)

Agentic tasks: 74.3 / 100 (3 benchmark families)

Overall: 68.1 / 100 (1 benchmark family)

19 matched rows from 9 benchmark families were considered. The radar shows 5 of 5 comparable categories.

GPT-5.6 LunaGemini 3.8 Flash

AA-BriefcaseOverall. Higher is better. No documented setup difference

GPT-5.6 Luna934.59 elo

Gemini 3.8 Flash1,181.5 elo

AA-LCROverall. Higher is better. No documented setup difference

GPT-5.6 Luna75.0%

Gemini 3.8 Flash84.0%

AA-OmniscienceOverall. Higher is better. No documented setup difference

GPT-5.6 Luna-13.183 points

Gemini 3.8 Flash28.583 points

Artificial Analysis Intelligence IndexOverall. Higher is better. No documented setup difference

GPT-5.6 Luna21.012 points

Gemini 3.8 Flash33.455 points

AutomationBench-AAOverall. Higher is better. No documented setup difference

GPT-5.6 Luna23.1%

Gemini 3.8 Flash60.9%

BioMysteryBenchOverall. Higher is better. Test setup not documented as identical

GPT-5.6 Luna61.481 %

Gemini 3.8 Flash62.222 %

Code MigrationOverall. Higher is better. Test setup not documented as identical

GPT-5.6 Luna44.55 %

Gemini 3.8 Flash36.546 %

CyberBench v1.1Overall. Higher is better. Test setup not documented as identical

GPT-5.6 Luna73.631 %

Gemini 3.8 Flash43.75 %

EMBOverall. Higher is better. Test setup not documented as identical

GPT-5.6 Luna67.116 %

Gemini 3.8 Flash72.196 %

Finance Agent (v2)Overall. Higher is better. Test setup not documented as identical

GPT-5.6 Luna55.044 %

Gemini 3.8 Flash61.435 %

GDP.pdfOverall. Higher is better. No documented setup difference

GPT-5.6 Luna15.2%

Gemini 3.8 Flash22.8%

GDPval-AAOverall. Higher is better. No documented setup difference

GPT-5.6 Luna1,129.07 elo

Gemini 3.8 Flash1,421.18 elo

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.6 Luna and Gemini 3.8 Flash
Benchmark and task	GPT-5.6 Luna	Gemini 3.8 Flash	Source
AA-BriefcaseOverall Test details No documented difference in the test setupVersion: v1.1Metric: AA-Briefcase EloScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	934.59 elo	Winner1,181.5 elo	Artificial Analysis Source details Data as of: 10/15/2026
AA-LCROverall Test details No documented difference in the test setupVersion: v1.1Metric: Pass rateScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	75.0%	Winner84.0%	Artificial Analysis Source details Data as of: 10/15/2026
AA-OmniscienceOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: AA-Omniscience IndexScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	-13.183 points The index can be negative and ranges from -100 to 100 according to Artificial Analysis.	Winner28.583 points The index can be negative and ranges from -100 to 100 according to Artificial Analysis.	Artificial Analysis Source details Data as of: 10/15/2026
Artificial Analysis Intelligence IndexOverall Test details No documented difference in the test setupVersion: v4.3.2Metric: Artificial Analysis Intelligence IndexScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Low), Reasoning: Low Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Low), Reasoning: LowGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Low) (release gpt-5-6-luna, row gpt-5-6-luna-low, UUID 050c61cd-cddc-463a-a30a-a82aaa37be59, reasoning=true, source reasoning-token configuration budget=0, suffix=Low). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Low) (release gemini-3-8-flash, row gemini-3-8-flash-low, UUID f6db039b-0f3b-485c-9d7f-982988e44f26, reasoning=true, source reasoning-token configuration budget=0, suffix=Low). This configured value is not measured token consumption.	21.012 points	Winner33.455 points	Artificial Analysis Source details Data as of: 10/15/2026
AutomationBench-AAOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: Objectives completed without guardrail violationsScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	23.1%	Winner60.9%	Artificial Analysis Source details Data as of: 10/15/2026
BioMysteryBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Harness: Terminus 2, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Harness: Terminus 2, Temperature: 1, Output limit: 65,536 tokens	61.481 %	Higher measured value62.222 %	Vals AI Source details Data as of: 10/12/2026
Code MigrationOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value44.55 %	36.546 %	Vals AI Source details Data as of: 10/12/2026
CyberBench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value73.631 %	43.75 %	Vals AI Source details Data as of: 10/12/2026
EMBOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	67.116 %	Higher measured value72.196 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	55.044 %	Higher measured value61.435 %	Vals AI Source details Data as of: 10/12/2026
GDP.pdfOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: All-pass rateScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	15.2%	Winner22.8%	Artificial Analysis Source details Data as of: 10/15/2026
GDPval-AAOverall Test details No documented difference in the test setupVersion: v2.1Metric: GDPval-AA EloScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	1,129.07 elo	Winner1,421.18 elo	Artificial Analysis Source details Data as of: 10/15/2026
GPQA DiamondOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	91.666 %	Higher measured value94.444 %	Vals AI Source details Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	1.25 %	Higher measured value10 %	Vals AI Source details Data as of: 10/12/2026
Humanity's Last ExamOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: Text-only pass@1 accuracyScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	25.8% Artificial Analysis describes this comparable run as 2,158 text-only questions, not the full 2,500-question dataset.	Winner42.1% Artificial Analysis describes this comparable run as 2,158 text-only questions, not the full 2,500-question dataset.	Artificial Analysis Source details Data as of: 10/15/2026
IOIOverall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value61.778 %	56.944 %	Vals AI Source details Data as of: 10/14/2026
Legal Research BenchOverall · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	36.538 %	Higher measured value38.942 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	84.034 %	Higher measured value86.993 %	Vals AI Source details Data as of: 10/13/2026
LMArena Text, Style ControlOverall Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Luna: Snapshot: gpt-5.6-luna-xhigh, Reasoning: xhigh, Harness: Arena Text, style control Gemini 3.8 Flash: Snapshot: gemini-3.8-flash-high, Reasoning: high, Harness: Arena Text, style controlGPT-5.6 Luna: Arena rating from 41,103 published pairwise votes.Gemini 3.8 Flash: Arena rating from 35,670 published pairwise votes.	1,452.509 95% confidence interval: ±4.306The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	Higher measured value1,496.319 95% confidence interval: ±4.654The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Vision, Style ControlOverall Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Luna: Snapshot: gpt-5.6-luna-xhigh, Reasoning: xhigh, Harness: Arena Vision, style control Gemini 3.8 Flash: Snapshot: gemini-3.8-flash-high, Reasoning: high, Harness: Arena Vision, style controlGPT-5.6 Luna: Arena rating from 11,086 published pairwise votes.Gemini 3.8 Flash: Arena rating from 3,792 published pairwise votes.	1,257.662 95% confidence interval: ±7.463The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	Higher measured value1,289.129 95% confidence interval: ±10.62The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/09/2026
MedCodeOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 30,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	42.391 %	Higher measured value48.135 %	Vals AI Source details Data as of: 10/13/2026
MedScribeOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 30,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	84.391 %	Higher measured value84.496 %	Vals AI Source details Data as of: 10/13/2026
MMLU-ProOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	86.036 %	Higher measured value90.221 %	Vals AI Source details Data as of: 09/01/2026
MMMU-ProOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	85.029 %	Higher measured value89.075 %	Vals AI Source details Data as of: 09/01/2026
MortgageTaxOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value67.29 %	65.342 %	Vals AI Source details Data as of: 09/01/2026
MysteryMechanismOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	14.414 %	Higher measured value36.486 %	Vals AI Source details Data as of: 10/12/2026
ProgramBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	0 %	Higher measured value1 %	Vals AI Source details Data as of: 10/12/2026
ProofBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value60 %	48 %	Vals AI Source details Data as of: 10/12/2026
Public Benefits Bench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	61.164 %	Higher measured value65.291 %	Vals AI Source details Data as of: 10/12/2026
SAGEOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 30,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 30,000 tokens	Higher measured value44.22 %	35.064 %	Vals AI Source details Data as of: 10/08/2026
SkillsBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Harness: OpenHands, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Harness: OpenHands, Temperature: 1, Output limit: 65,536 tokens	Higher measured value60.447 %	57.985 %	Vals AI Source details Data as of: 09/27/2026
SRE BenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully solved rateScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	1.527 %	Higher measured value11.069 %	Vals AI Source details Data as of: 10/14/2026
SWE-bench VerifiedOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value93 %	80 %	Vals AI Source details Data as of: 09/01/2026
Tax Agent BenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	24.815 %	Higher measured value32.124 %	Vals AI Source details Data as of: 10/12/2026
TaxEval v2Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value76.166 %	74.448 %	Vals AI Source details Data as of: 09/01/2026
Terminal-BenchOverall Test details No documented difference in the test setupVersion: 4.0Metric: Task successScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	0.5%	Winner19.7%	Artificial Analysis Source details Data as of: 10/15/2026
Terminal-Bench 2.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	79.026 %	Higher measured value81.273 %	Vals AI Source details Data as of: 09/28/2026
Terminal-Bench 4.0Overall Test details Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	11.616 %	Higher measured value19.697 %	Vals AI Source details Data as of: 10/13/2026
Terminal-Bench ScienceOverall Test details Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Harness: Mini-SWE-agent, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 65,536 tokens	0 %	Higher measured value8.571 %	Vals AI Source details Data as of: 10/14/2026
Vals IndexOverall Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: weighted index scoreScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	51.687 %	Higher measured value54.887 %	Vals AI Source details Data as of: 10/13/2026
Vibe Code Bench 1-100Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.0Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Harness: OpenHands, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Harness: OpenHands, Temperature: 1, Output limit: 65,536 tokens	Higher measured value22.594 %	18.772 %	Vals AI Source details Data as of: 10/14/2026
Vibe Code Bench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Harness: OpenHands, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Harness: OpenHands, Temperature: 1, Output limit: 65,536 tokens	77.055 %	Higher measured value78.651 %	Vals AI Source details Data as of: 10/12/2026
AA-BriefcaseOverall Test details No documented difference in the test setupVersion: v1.1Metric: AA-Briefcase EloScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	1,170.08 elo	Winner1,203.02 elo	Artificial Analysis Source details Data as of: 10/15/2026
AA-LCROverall Test details No documented difference in the test setupVersion: v1.1Metric: Pass rateScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	80.3%	Winner81.3%	Artificial Analysis Source details Data as of: 10/15/2026
AA-OmniscienceOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: AA-Omniscience IndexScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	-12 points The index can be negative and ranges from -100 to 100 according to Artificial Analysis.	Winner29.55 points The index can be negative and ranges from -100 to 100 according to Artificial Analysis.	Artificial Analysis Source details Data as of: 10/15/2026
Artificial Analysis Intelligence IndexOverall Test details No documented difference in the test setupVersion: v4.3.2Metric: Artificial Analysis Intelligence IndexScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (Medium), Reasoning: Medium Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (Medium), Reasoning: MediumGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (Medium) (release gpt-5-6-luna, row gpt-5-6-luna-medium, UUID 58b812bf-8498-46db-b834-f43ccc614b61, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (Medium) (release gemini-3-8-flash, row gemini-3-8-flash-medium, UUID 744fa3c1-42a7-4995-b138-fb6be11f463c, reasoning=true, source reasoning-token configuration budget=0, suffix=Medium). This configured value is not measured token consumption.	25.036 points	Winner39.774 points	Artificial Analysis Source details Data as of: 10/15/2026
AutomationBench-AAOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: Objectives completed without guardrail violationsScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	35.6%	Winner59.9%	Artificial Analysis Source details Data as of: 10/15/2026
BioMysteryBenchHard Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Harness: Terminus 2, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Harness: Terminus 2, Temperature: 1, Output limit: 65,536 tokens	Higher measured value27.451 %	21.569 %	Vals AI Source details Data as of: 10/12/2026
Code MigrationCLI Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value36.067 %	25.871 %	Vals AI Source details Data as of: 10/12/2026
CyberBench v1.1Patch Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	83.929 %	Higher measured value87.5 %	Vals AI Source details Data as of: 10/12/2026
EMBComps Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	54.573 %	Higher measured value76.435 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Adjustments Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	52.027 %	Higher measured value54.828 %	Vals AI Source details Data as of: 10/12/2026
GDP.pdfOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: All-pass rateScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	Winner22.2%	21.0%	Artificial Analysis Source details Data as of: 10/15/2026
GDPval-AAOverall Test details No documented difference in the test setupVersion: v2.1Metric: GDPval-AA EloScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	1,330.1 elo	Winner1,436.3 elo	Artificial Analysis Source details Data as of: 10/15/2026
GPQA DiamondFew-Shot CoT Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	92.424 %	Higher measured value94.949 %	Vals AI Source details Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	85.145 %	Higher measured value87.681 %	Vals AI Source details Data as of: 10/12/2026
Humanity's Last ExamOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: Text-only pass@1 accuracyScoring: Higher is betterGPT-5.6 Luna: Snapshot: GPT-5.6 Luna (High), Reasoning: High Gemini 3.8 Flash: Snapshot: Gemini 3.8 Flash (High), Reasoning: HighGPT-5.6 Luna: Exact AA configuration: GPT-5.6 Luna (High) (release gpt-5-6-luna, row gpt-5-6-luna-high, UUID aa55297e-8fbf-4372-b4ab-9b068dc6396c, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.Gemini 3.8 Flash: Exact AA configuration: Gemini 3.8 Flash (High) (release gemini-3-8-flash, row gemini-3-8-flash, UUID 8a999846-4c1d-4ce7-a8b7-1310a7166fd7, reasoning=true, source reasoning-token configuration budget=0, suffix=High). This configured value is not measured token consumption.	33.4% Artificial Analysis describes this comparable run as 2,158 text-only questions, not the full 2,500-question dataset.	Winner47.8% Artificial Analysis describes this comparable run as 2,158 text-only questions, not the full 2,500-question dataset.	Artificial Analysis Source details Data as of: 10/15/2026
IOIIOI 2024 Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value85 %	55.667 %	Vals AI Source details Data as of: 10/14/2026
Legal Research BenchAdministrative / Regulatory · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value48.485 %	46.97 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchConclusion Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	88.864 %	Higher measured value90.691 %	Vals AI Source details Data as of: 10/13/2026
LMArena Text, Style ControlBusiness, management and finance Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Luna: Snapshot: gpt-5.6-luna-xhigh, Reasoning: xhigh, Harness: Arena Text, style control Gemini 3.8 Flash: Snapshot: gemini-3.8-flash-high, Reasoning: high, Harness: Arena Text, style controlGPT-5.6 Luna: Arena rating from 7,709 published pairwise votes.Gemini 3.8 Flash: Arena rating from 6,520 published pairwise votes.	1,461.658 95% confidence interval: ±7.593The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	Higher measured value1,479.887 95% confidence interval: ±8.136The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Vision, Style ControlChinese Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Luna: Snapshot: gpt-5.6-luna-xhigh, Reasoning: xhigh, Harness: Arena Vision, style control Gemini 3.8 Flash: Snapshot: gemini-3.8-flash-high, Reasoning: high, Harness: Arena Vision, style controlGPT-5.6 Luna: Arena rating from 633 published pairwise votes.Gemini 3.8 Flash: Arena rating from 182 published pairwise votes.	1,278.602 95% confidence interval: ±24.931The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	Higher measured value1,379.729 95% confidence interval: ±43.521The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/09/2026
MMLU-ProBiology Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	93.305 %	Higher measured value94.979 %	Vals AI Source details Data as of: 09/01/2026
MortgageTaxNumerical Extraction Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Luna: Reasoning: max, Output limit: 128,000 tokens Gemini 3.8 Flash: Reasoning: high, Temperature: 1, Output limit: 65,536 tokens	Higher measured value75.596 %	70.588 %	Vals AI Source details Data as of: 09/01/2026
Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

SVG short test

One SVG prompt and fixed output settings. Captures are shown only with 0 reported reasoning tokens or documented lack of reasoning controls. Identical test conditions do not make the models' internal compute identical.

Shared test round: 4ae5d8eeb9a9

GPT-5.6 Luna

Unavailable in this round

Gemini 3.8 Flash

Unavailable in this round

Earlier tests

Pelican on a bicycle

A community classic for free-form SVG drawing.

GPT-5.6 Luna

Reasoning (requested): high

Current attempt

Run date: Sep 7, 2026
API provider: openrouter
Requested API model: openai/gpt-5.6-luna
API model reported in response: openai/gpt-5.6-luna
Reasoning setting: high
Pinned endpoint: OpenAI | openai/gpt-5.6-luna-20260709
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Passed, not a quality rating
Response time: 49.9 s

Visually reviewed. This individual test does not establish overall model quality.

Gemini 3.8 Flash

The response reached the token limit. No complete recording is available.

Reasoning (requested): high

Current attempt

Run date: Oct 5, 2026
API provider: openrouter
Requested API model: google/gemini-3.8-flash
API model reported in response: google/gemini-3.8-flash
Reasoning setting: high
Pinned endpoint: Google AI Studio | google/gemini-3.8-flash-20260902
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Failed
Response time: 40.2 s

Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.

Earlier attempts (3)

Oct 2, 2026API request failedReasoning setting: high
Oct 1, 2026API request failedReasoning setting: high
Sep 7, 2026API request failedReasoning setting: high

Prompt and test conditions

Generate an SVG of a pelican riding a bicycle

Token limit including reasoning: 8,192 tokens

Task origin (Simon Willison)

How to read this comparison

Winning one benchmark is not an overall verdict

Your workload, budget, and required context length matter most. A coding benchmark says little about visual understanding or agent performance.

The standard price table uses direct developer rates. The provider comparison labels OpenRouter endpoints, regions, and special tariffs separately.

Every result links to its measurement source and retrieval date. Labels distinguish vendor reports, official benchmark leaderboards, and independent evaluations. Disputed or archived results are excluded.

More matchups

Compare GPT-5.6 Luna and Gemini 3.8 Flash with other leading models using the same data and benchmark logic.

View the complete LLM comparison

GPT-5.6 Luna vs. Gemini 3.8 Flash

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General specifications

API pricing compared

Shared benchmarks

Capability profile from matched benchmarks

Our tests

SVG short test

GPT-5.6 Luna

Gemini 3.8 Flash

Pelican on a bicycle

Winning one benchmark is not an overall verdict

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