Head-to-head comparison

GPT-5.4 mini vs. Grok 4.5

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

shared result series: 139
distinct benchmarks: 20
latest retrieval: 2026-09-04

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-5.4 mini and Grok 4.5
Attribute	GPT-5.4 mini	Grok 4.5
Provider	OpenAI	xAI
Released	Mar 2026	Jul 16, 2026
Availability	Active	Active
Model type	Proprietary	Proprietary
Parameters	Not published	Not published
Architecture	Not published	Not published
Context window	400,000 tokens	500,000 tokens
Knowledge cutoff	August 31, 2025	February 1, 2026
Technical sources	Model	Model

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-5.4 mini and Grok 4.5
Price type	GPT-5.4 mini	Grok 4.5
API input	$0.75	$2 ≤200K / $4 >200K
API output	$4.5	$6 ≤200K / $12 >200K
Cache read	$0.07	$0.3 ≤200K / $0.6 >200K
Cache write (5 min.)	Not listed	Not listed
Cache write (1 hr.)	Not listed	Not listed
Price verified	07/30/2026 Source	08/11/2026 Source

GPT-5.4 miniGrok 4.5

API inputUSD per 1M tokens, base tier

GPT-5.4 mini$0.75

Grok 4.5$2

API outputUSD per 1M tokens, base tier

GPT-5.4 mini$4.5

Grok 4.5$6

Cache readUSD per 1M tokens, base tier

GPT-5.4 mini$0.075

Grok 4.5$0.3

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-5.4 mini and Grok 4.5
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
GPT-5.4 mini	OpenAI	Direct from developerStandard API	$0.75	$4.5	Source07/30/2026
	Azure	Via OpenRouterazure	$0.75	$4.5	Source09/07/2026
	Azure	Via OpenRouterazure/us	$0.825	$4.95	Source09/07/2026
	OpenAI	Via OpenRouteropenai	$0.75	$4.5	Source09/07/2026
	OpenAI	Via OpenRouteropenai/fast	$1.5	$9	Source09/07/2026
	OpenAI	Via OpenRouteropenai/flex	Lowest listed price: $0.375	Lowest listed price: $2.25	Source09/07/2026
Grok 4.5	xAI	Direct from developerUp to 200,000 context tokens	Lowest listed price: $2	Lowest listed price: $6	Source08/11/2026
	xAI	Direct from developerAbove 200,000 context tokens	$4	$12	Source08/11/2026
	xAI	Via OpenRouterxai	Lowest listed price: $2	Lowest listed price: $6	Source09/07/2026
	xAI	Via OpenRouterxai/priority	$4	$12	Source09/07/2026
	xAI	Via OpenRouterxai/zdr	Lowest listed price: $2	Lowest listed price: $6	Source09/07/2026
	xAI	Via OpenRouterxai/zdr/priority	$4	$12	Source09/07/2026

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-5.4 mini

Grok 4.5

Coding: 76.5 / 100 (5 benchmark families)

Reasoning: 89.4 / 100 (1 benchmark family)

Knowledge: 94.8 / 100 (1 benchmark family)

Finance: 93.9 / 99.5 (5 benchmark families)

Legal: 16.5 / 100 (2 benchmark families)

Agentic tasks: 80.7 / 100 (1 benchmark family)

Multimodal: 100 / 78 (1 benchmark family)

Education: 100 / 68.8 (1 benchmark family)

21 matched rows from 19 benchmark families were considered. The radar shows 8 of 9 comparable categories.

GPT-5.4 miniGrok 4.5

Code MigrationOverall. Higher is better. No documented setup difference

GPT-5.4 mini12.936 %

Grok 4.536.596 %

CorpFin v2Overall. Higher is better. No documented setup difference

GPT-5.4 mini60.917 %

Grok 4.567.405 %

EMBOverall. Higher is better. No documented setup difference

GPT-5.4 mini45.426 %

Grok 4.552.911 %

Finance Agent (v2)Overall. Higher is better. No documented setup difference

GPT-5.4 mini45.36 %

Grok 4.548.349 %

GPQA DiamondOverall. Higher is better. No documented setup difference

GPT-5.4 mini83.08 %

Grok 4.592.929 %

Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference

GPT-5.4 mini0 %

Grok 4.512.917 %

Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference

GPT-5.4 mini12.5 %

Grok 4.537.981 %

LiveCodeBench v6Overall. Higher is better. No documented setup difference

GPT-5.4 mini81.465 %

Grok 4.587.351 %

LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical

GPT-5.4 mini1,448.118

Grok 4.51,470.015

MMLU-ProOverall. Higher is better. No documented setup difference

GPT-5.4 mini84.554 %

Grok 4.589.216 %

MMMU-ProOverall. Higher is better. No documented setup difference

GPT-5.4 mini79.249 %

Grok 4.561.792 %

MortgageTaxOverall. Higher is better. No documented setup difference

GPT-5.4 mini63.514 %

Grok 4.561.804 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.4 mini and Grok 4.5
Benchmark and task	GPT-5.4 mini	Grok 4.5	Source
Code MigrationOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	12.936 %	Winner36.596 %	Vals AI Source details Data as of: 09/03/2026
CorpFin v2Overall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	60.917 %	Winner67.405 %	Vals AI Source details Data as of: 08/12/2026
EMBOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	45.426 %	Winner52.911 %	Vals AI Source details Data as of: 09/03/2026
Finance Agent (v2)Overall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	45.36 %	Winner48.349 %	Vals AI Source details Data as of: 09/03/2026
GPQA DiamondOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	83.08 %	Winner92.929 %	Vals AI Source details Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved Test details No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	0 %	Winner12.917 %	Vals AI Source details Data as of: 09/03/2026
Legal Research BenchOverall · All-pass Test details No documented difference in the test setupVersion: 1Metric: all-pass rateScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	12.5 %	Winner37.981 %	Vals AI Source details Data as of: 09/03/2026
LiveCodeBench v6Overall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	81.465 %	Winner87.351 %	Vals AI Source details Data as of: 09/01/2026
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-5.4 mini: Snapshot: gpt-5.4-mini-high, Reasoning: high, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4 mini: Style-controlled Arena rating from 59,472 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 25,873 anonymous pairwise votes.	1,448.118 95% confidence interval: ±3.851The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	Higher measured value1,470.015 95% confidence interval: ±4.921The 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: 09/01/2026
MMLU-ProOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	84.554 %	Winner89.216 %	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 betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	Winner79.249 %	61.792 %	Vals AI Source details Data as of: 09/01/2026
MortgageTaxOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	Winner63.514 %	61.804 %	Vals AI Source details Data as of: 09/01/2026
ProgramBenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	Tie0 %	Tie0 %	Vals AI Source details Data as of: 09/01/2026
SAGEOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	Winner50.813 %	34.967 %	Vals AI Source details Data as of: 09/03/2026
SWE-bench VerifiedOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	73 %	Winner86.6 %	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 betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	71.218 %	Winner71.668 %	Vals AI Source details Data as of: 09/01/2026
Terminal-Bench 2.1Overall Test details No documented difference in the test setupVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	54.682 %	Winner67.79 %	Vals AI Source details Data as of: 09/03/2026
Vals IndexOverall Test details No documented difference in the test setupVersion: 2Metric: weighted index scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	39.632 %	Winner51.528 %	Vals AI Source details Data as of: 09/03/2026
Vals Multimodal IndexOverall Test details No documented difference in the test setupVersion: 1.2Metric: weighted index scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17	54.219 %	Winner63.42 %	Vals AI Source details Data as of: 08/11/2026
Vibe Code Bench v1.1Overall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Harness: OpenHands Grok 4.5: Harness: OpenHands	47.969 %	Winner69.002 %	Vals AI Source details Data as of: 09/03/2026
Code MigrationCLI Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	8.2 %	Higher measured value25.461 %	Vals AI Source details Data as of: 08/09/2026
CorpFin v2Exact Pages Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	61.538 %	Higher measured value66.317 %	Vals AI Source details Data as of: 08/06/2026
EMBComps Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value40.488 %	39.489 %	Vals AI Source details Data as of: 08/06/2026
Finance Agent (v2)Adjustments Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value45.366 %	38.568 %	Vals AI Source details Data as of: 08/06/2026
GPQA DiamondFew-Shot CoT Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	84.848 %	Higher measured value92.929 %	Vals AI Source details Data as of: 08/09/2026
Legal Research BenchAdministrative / Regulatory · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	15.152 %	Higher measured value51.515 %	Vals AI Source details Data as of: 08/06/2026
LiveCodeBench v6Easy Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	97.826 %	Higher measured value99.068 %	Vals AI Source details Data as of: 08/09/2026
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-5.4 mini: Snapshot: gpt-5.4-mini-high, Reasoning: high, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4 mini: Style-controlled Arena rating from 12,113 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 5,122 anonymous pairwise votes.	1,459.508 95% confidence interval: ±6.653The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	Higher measured value1,465.734 95% confidence interval: ±8.936The 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: 09/01/2026
MMLU-ProBiology Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	91.353 %	Higher measured value94.282 %	Vals AI Source details Data as of: 08/09/2026
MortgageTaxNumerical Extraction Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value79.412 %	62.798 %	Vals AI Source details Data as of: 08/09/2026
ProgramBenchAlmost Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	3 %	Higher measured value4.5 %	Vals AI Source details Data as of: 08/09/2026
SAGEAutomata Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 30,000 tokens Grok 4.5: Reasoning: high, Temperature: 1, Top P: 0.95, Output limit: 30,000 tokens	Higher measured value41.27 %	32.54 %	Vals AI Source details Data as of: 08/09/2026
SWE-bench Verified<15 min fix Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	85.567 %	Higher measured value93.814 %	Vals AI Source details Data as of: 08/08/2026
TaxEval v2Correctness Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value63.042 %	62.551 %	Vals AI Source details Data as of: 08/09/2026
Terminal-Bench 2.1Easy Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: high, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	75 %	Higher measured value91.667 %	Vals AI Source details Data as of: 08/06/2026
Vals IndexCorpFin v2 Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: benchmark scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	60.256 %	Higher measured value68.415 %	Vals AI Source details Data as of: 08/09/2026
Vals Multimodal IndexCorpFin v2 Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: benchmark scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	60.256 %	Higher measured value68.415 %	Vals AI Source details Data as of: 08/09/2026
Code MigrationCOBOL Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	27.143 %	Higher measured value70 %	Vals AI Source details Data as of: 08/09/2026
CorpFin v2Max Fitting Context Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	60.956 %	Higher measured value67.483 %	Vals AI Source details Data as of: 08/06/2026
EMBDataroom Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	48.286 %	Higher measured value64.953 %	Vals AI Source details Data as of: 08/06/2026
Finance Agent (v2)All-Pass Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	32.369 %	Higher measured value36.743 %	Vals AI Source details Data as of: 08/06/2026
GPQA DiamondZero-Shot CoT Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	81.313 %	Higher measured value92.929 %	Vals AI Source details Data as of: 08/09/2026
Legal Research BenchAdministrative / Regulatory · Weighted partial credit Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: weighted partial-credit scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	69.72 %	Higher measured value88.75 %	Vals AI Source details Data as of: 08/06/2026
LiveCodeBench v6Hard Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	61.714 %	Higher measured value73.429 %	Vals AI Source details Data as of: 08/09/2026
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-5.4 mini: Snapshot: gpt-5.4-mini-high, Reasoning: high, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4 mini: Style-controlled Arena rating from 3,298 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 1,737 anonymous pairwise votes.	1,477.451 95% confidence interval: ±11.125The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	Higher measured value1,512.8 95% confidence interval: ±15.002The 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: 09/01/2026
MMLU-ProBusiness Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	89.734 %	Higher measured value93.283 %	Vals AI Source details Data as of: 08/09/2026
MortgageTaxSemantic Extraction Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	47.615 %	Higher measured value60.811 %	Vals AI Source details Data as of: 08/09/2026
ProgramBenchFully Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	No direct winner0 %	No direct winner0 %	Vals AI Source details Data as of: 08/09/2026
SAGECalculus Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 30,000 tokens Grok 4.5: Reasoning: high, Temperature: 1, Top P: 0.95, Output limit: 30,000 tokens	59.259 %	Higher measured value59.568 %	Vals AI Source details Data as of: 08/09/2026
SWE-bench Verified>4 hours Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	0 %	Higher measured value66.667 %	Vals AI Source details Data as of: 08/08/2026
TaxEval v2Stepwise Reasoning Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	79.395 %	Higher measured value80.785 %	Vals AI Source details Data as of: 08/09/2026
Terminal-Bench 2.1Hard Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: high, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	34.444 %	Higher measured value56.667 %	Vals AI Source details Data as of: 08/06/2026
Vals IndexFinance Agent v2 Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: benchmark scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	45.407 %	Higher measured value48.751 %	Vals AI Source details Data as of: 08/09/2026
Vals Multimodal IndexFinance Agent v2 Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: benchmark scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	45.407 %	Higher measured value48.751 %	Vals AI Source details Data as of: 08/09/2026
Code MigrationCode Quality Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: mean reviewer code-quality ratingScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	3.053 / 5	Higher measured value4.078 / 5	Vals AI Source details Data as of: 08/09/2026
CorpFin v2Shared Max Context Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	60.256 %	Higher measured value68.415 %	Vals AI Source details Data as of: 08/06/2026
EMBDCF Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	40.605 %	Higher measured value41.455 %	Vals AI Source details Data as of: 08/06/2026
Finance Agent (v2)Comparables Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	40.273 %	Higher measured value41.768 %	Vals AI Source details Data as of: 08/06/2026
Legal Research BenchBusiness & Commercial · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	11.628 %	Higher measured value30.233 %	Vals AI Source details Data as of: 08/06/2026
LiveCodeBench v6Medium Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	84.856 %	Higher measured value89.556 %	Vals AI Source details Data as of: 08/09/2026
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-5.4 mini: Snapshot: gpt-5.4-mini-high, Reasoning: high, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4 mini: Style-controlled Arena rating from 16,204 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 7,308 anonymous pairwise votes.	1,495.819 95% confidence interval: ±6.028The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	Higher measured value1,522.456 95% confidence interval: ±7.787The 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: 09/01/2026
MMLU-ProChemistry Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	89.134 %	Higher measured value91.608 %	Vals AI Source details Data as of: 08/09/2026
ProgramBenchRaw Pass Rate Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	54.375 %	Higher measured value65.246 %	Vals AI Source details Data as of: 08/09/2026
SAGELinear Algebra Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: xhigh, Output limit: 30,000 tokens Grok 4.5: Reasoning: high, Temperature: 1, Top P: 0.95, Output limit: 30,000 tokens	Higher measured value71.486 %	46.964 %	Vals AI Source details Data as of: 08/09/2026
Key to the marks:better valuebetter, but not conclusivetie

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