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Head-to-head comparison

GPT-5.6 Luna vs. Mistral Large 3

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

shared result series
38
distinct benchmarks
10
latest retrieval
2026-09-29

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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 Mistral Large 3
AttributeGPT-5.6 LunaMistral Large 3
ProviderOpenAIMistral AI
ReleasedJul 9, 2026Dec 2, 2025
AvailabilityActiveActive
Model typeProprietaryOpen Weights
ParametersNot published675B, 41B active
ArchitectureNot publishedMixture of Experts
Context window1,050,000 tokens262,144 tokens
Knowledge cutoffFebruary 16, 2026Not published
Technical sourcesModel, Context, Knowledge cutoffModel, Context

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 Mistral Large 3
Price typeGPT-5.6 LunaMistral Large 3
API input$0.2 ≤272K / $0.4 >272K$0.5
API output$1.2 ≤272K / $1.8 >272K$1.5
Cache read$0.02 ≤272K / $0.04 >272KNot listed
Cache write (5 min.)$0.25 ≤272K / $0.5 >272KNot listed
Cache write (1 hr.)Not listedNot listed
Price verified09/22/2026 Source09/22/2026 Source
GPT-5.6 LunaMistral Large 3
API inputUSD per 1M tokens, base tier
GPT-5.6 LunaLower price$0.2
Mistral Large 3$0.5
API outputUSD per 1M tokens, base tier
GPT-5.6 LunaLower price$1.2
Mistral Large 3$1.5

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 Mistral Large 3
ModelProviderPurchase route and tariffInput per 1M tokensOutput per 1M tokensSource
GPT-5.6 LunaOpenAIDirect from developerUp to 272,000 context tokens$0.2$1.2Source09/22/2026
OpenAIDirect from developerAbove 272,000 context tokens$0.4$1.8Source09/22/2026
Amazon BedrockVia OpenRouteramazon-bedrock/us-east-1$0.22$1.32Source10/02/2026
AzureVia OpenRouterazure$0.2$1.2Source10/02/2026
AzureVia OpenRouterazure/eu$0.22$1.32Source10/02/2026
AzureVia OpenRouterazure/us$0.22$1.32Source10/02/2026
OpenAIVia OpenRouteropenai$0.2$1.2Source10/02/2026
OpenAIVia OpenRouteropenai/fast$0.4$2.4Source10/02/2026
OpenAIVia OpenRouteropenai/flexLowest listed price: $0.1Lowest listed price: $0.6Source10/02/2026
Mistral Large 3Mistral AIDirect from developerStandard APILowest listed price: $0.5Lowest listed price: $1.5Source09/22/2026
MistralVia OpenRoutermistral/eu$0.55$1.65Source10/02/2026
MistralVia OpenRoutermistral/zdrLowest listed price: $0.5Lowest listed price: $1.5Source10/02/2026

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.

255075100CodingReasoningKnowledgeFinanceLegalMultimodalEducation
GPT-5.6 Luna
Mistral Large 3
Coding: 100 / 44.5 (1 benchmark family)
Reasoning: 100 / 74.7 (1 benchmark family)
Knowledge: 100 / 92.8 (1 benchmark family)
Finance: 100 / 89.5 (3 benchmark families)
Legal: 100 / 94.2 (1 benchmark family)
Multimodal: 100 / 77.8 (1 benchmark family)
Education: 100 / 55.6 (1 benchmark family)

9 matched rows from 9 benchmark families were considered. The radar shows 7 of 7 comparable categories.

GPT-5.6 LunaMistral Large 3
CorpFin v2Overall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner64.219 %
Mistral Large 361.033 %
GPQA DiamondOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner91.666 %
Mistral Large 368.434 %
LegalBenchOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner84.034 %
Mistral Large 379.138 %
LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical
GPT-5.6 LunaHigher measured value1,453.977
Mistral Large 31,413.254
MMLU-ProOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner86.036 %
Mistral Large 379.823 %
MMMU-ProOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner85.029 %
Mistral Large 366.185 %
MortgageTaxOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner67.29 %
Mistral Large 352.106 %
SAGEOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner44.22 %
Mistral Large 324.595 %
SWE-bench VerifiedOverall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner93 %
Mistral Large 341.4 %
TaxEval v2Overall. Higher is better. No documented setup difference
GPT-5.6 LunaWinner76.166 %
Mistral Large 373.058 %
LMArena Text, Style ControlBusiness, management and finance. Higher is better. Test setup not documented as identical
GPT-5.6 LunaHigher measured value1,463.458
Mistral Large 31,409.446
LMArena Text, Style ControlChinese. Higher is better. Test setup not documented as identical
GPT-5.6 LunaHigher measured value1,476.096
Mistral Large 31,434.058

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.6 Luna and Mistral Large 3
Benchmark and taskGPT-5.6 LunaMistral Large 3Source
CorpFin v2Overall
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better
Winner64.219 %
61.033 %
Vals AI
Source details
Data as of: 08/12/2026
GPQA DiamondOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner91.666 %
68.434 %
Vals AI
Source details
Data as of: 09/01/2026
LegalBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner84.034 %
79.138 %
Vals AI
Source details
Data as of: 09/27/2026
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 35,823 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 77,456 anonymous pairwise votes.
Higher measured value1,453.977
95% confidence interval: ±4.487The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,413.254
95% confidence interval: ±2.912The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
MMLU-ProOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner86.036 %
79.823 %
Vals AI
Source details
Data as of: 09/01/2026
MMMU-ProOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner85.029 %
66.185 %
Vals AI
Source details
Data as of: 09/01/2026
MortgageTaxOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner67.29 %
52.106 %
Vals AI
Source details
Data as of: 09/01/2026
SAGEOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner44.22 %
24.595 %
Vals AI
Source details
Data as of: 09/26/2026
SWE-bench VerifiedOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner93 %
41.4 %
Vals AI
Source details
Data as of: 09/01/2026
TaxEval v2Overall
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better
Winner76.166 %
73.058 %
Vals AI
Source details
Data as of: 09/01/2026
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 6,871 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 14,597 anonymous pairwise votes.
Higher measured value1,463.458
95% confidence interval: ±7.984The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,409.446
95% confidence interval: ±5.509The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, 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 text, style control
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 2,848 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 5,845 anonymous pairwise votes.
Higher measured value1,476.096
95% confidence interval: ±11.945The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,434.058
95% confidence interval: ±8.22The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlCoding
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 9,953 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 19,574 anonymous pairwise votes.
Higher measured value1,500.651
95% confidence interval: ±6.941The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,469.182
95% confidence interval: ±4.902The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlCreative writing
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 7,224 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 13,448 anonymous pairwise votes.
Higher measured value1,411.66
95% confidence interval: ±8.114The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,372.648
95% confidence interval: ±5.824The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlEnglish
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 14,412 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 32,060 anonymous pairwise votes.
Higher measured value1,468.153
95% confidence interval: ±5.981The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,426.615
95% confidence interval: ±4.05The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlEntertainment, sports and media
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 9,172 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 16,716 anonymous pairwise votes.
Higher measured value1,420.336
95% confidence interval: ±7.365The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,371.316
95% confidence interval: ±5.299The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlExcluding ties
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 26,843 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 56,501 anonymous pairwise votes.
Higher measured value1,456.35
95% confidence interval: ±5.884The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,400.18
95% confidence interval: ±4.058The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlExpert prompts
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 4,120 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 7,295 anonymous pairwise votes.
Higher measured value1,491.278
95% confidence interval: ±9.879The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,427.543
95% confidence interval: ±7.482The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlFrench
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 1,142 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 2,181 anonymous pairwise votes.
Higher measured value1,483.582
95% confidence interval: ±18.965The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,432.389
95% confidence interval: ±14.389The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlGerman
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 613 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 1,257 anonymous pairwise votes.
Higher measured value1,480.869
95% confidence interval: ±24.898The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,409.467
95% confidence interval: ±17.833The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlHard prompts
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 23,834 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 47,316 anonymous pairwise votes.
Higher measured value1,475.057
95% confidence interval: ±5.221The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,431.274
95% confidence interval: ±3.63The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlHard prompts, English
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 9,658 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 19,638 anonymous pairwise votes.
Higher measured value1,486.669
95% confidence interval: ±6.97The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,439.274
95% confidence interval: ±4.91The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlInstruction following
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 12,879 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 24,861 anonymous pairwise votes.
Higher measured value1,445.83
95% confidence interval: ±6.353The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,400.115
95% confidence interval: ±4.491The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlJapanese
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 524 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 830 anonymous pairwise votes.
Higher measured value1,433.144
95% confidence interval: ±28.23The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,382.659
95% confidence interval: ±22.106The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlKorean
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 669 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 1,318 anonymous pairwise votes.
Higher measured value1,412.685
95% confidence interval: ±23.246The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,356.821
95% confidence interval: ±17.794The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlLegal and government
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 3,026 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 5,879 anonymous pairwise votes.
Higher measured value1,462.12
95% confidence interval: ±11.494The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,421.357
95% confidence interval: ±8.211The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlLife, physical and social science
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 5,837 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 12,690 anonymous pairwise votes.
Higher measured value1,459.939
95% confidence interval: ±8.426The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,428.685
95% confidence interval: ±5.734The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlLonger queries
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 17,076 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 29,146 anonymous pairwise votes.
Higher measured value1,452.289
95% confidence interval: ±6.017The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,417.29
95% confidence interval: ±4.417The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlMath
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 1,659 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 4,411 anonymous pairwise votes.
Higher measured value1,474.058
95% confidence interval: ±14.679The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,401.493
95% confidence interval: ±9.177The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlMathematical professions
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 1,994 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 4,047 anonymous pairwise votes.
Higher measured value1,483.361
95% confidence interval: ±13.883The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,413.935
95% confidence interval: ±9.781The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlMedicine and healthcare
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 2,653 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 5,443 anonymous pairwise votes.
Higher measured value1,436.072
95% confidence interval: ±12.409The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,430.076
95% confidence interval: ±8.59The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlMulti-turn
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 5,852 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 13,164 anonymous pairwise votes.
Higher measured value1,456
95% confidence interval: ±8.525The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,419.382
95% confidence interval: ±5.74The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlNon-English
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 21,398 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 45,384 anonymous pairwise votes.
Higher measured value1,436.495
95% confidence interval: ±5.342The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,397.089
95% confidence interval: ±3.587The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlPolish
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 532 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 1,754 anonymous pairwise votes.
Higher measured value1,436.589
95% confidence interval: ±25.634The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,414.116
95% confidence interval: ±14.298The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlRussian
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 4,014 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 9,292 anonymous pairwise votes.
Higher measured value1,448.031
95% confidence interval: ±9.808The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,408.043
95% confidence interval: ±6.505The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlSoftware and IT services
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 14,167 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 29,068 anonymous pairwise votes.
Higher measured value1,492.775
95% confidence interval: ±6.123The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,455.584
95% confidence interval: ±4.237The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlSpanish
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 1,039 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 2,328 anonymous pairwise votes.
Higher measured value1,461.097
95% confidence interval: ±19.283The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,405.285
95% confidence interval: ±13.338The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
LMArena Text, Style ControlWriting, literature and language
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
Mistral Large 3: Snapshot: mistral-large-3, Harness: Arena text, style control
GPT-5.6 Luna: Style-controlled Arena rating from 9,607 anonymous pairwise votes.Mistral Large 3: Style-controlled Arena rating from 19,002 anonymous pairwise votes.
Higher measured value1,435.176
95% confidence interval: ±7.11The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,388.294
95% confidence interval: ±4.988The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026

Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

Compare how the models respond to the same prompt. Each test shows the first attempt, with no subsequent fixes to the generated code. These results do not contribute to an overall score.

Pelican on a bicycle

A community classic for free-form SVG drawing.

GPT-5.6 Luna

GPT-5.6 Luna: Pelican on a bicycle
A community classic for free-form SVG drawing.

Reasoning (requested): high

First attempt
Run date
7 Sept 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.

Mistral Large 3

API access was unavailable for this run. The model was not evaluated.

Reasoning (model default): no reasoning mode Source

First attempt
Run date
7 Sept 2026
API provider
openrouter
Requested API model
mistralai/mistral-large-2512
Reasoning setting
not specified
Pinned endpoint
Mistral | mistralai/mistral-large-2512
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Not run

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

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 Mistral Large 3 with other leading models using the same data and benchmark logic.

View the complete LLM comparison