Head-to-head comparison

GPT-5.4 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: 171
distinct benchmarks: 18
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 and Grok 4.5
Attribute	GPT-5.4	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	1,050,000 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 and Grok 4.5
Price type	GPT-5.4	Grok 4.5
API input	$2.5 ≤272K / $5 >272K	$2 ≤200K / $4 >200K
API output	$15 ≤272K / $22.5 >272K	$6 ≤200K / $12 >200K
Cache read	$0.25 ≤272K / $0.5 >272K	$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-5.4Grok 4.5

API inputUSD per 1M tokens, base tier

GPT-5.4$2.5

Grok 4.5$2

API outputUSD per 1M tokens, base tier

GPT-5.4$15

Grok 4.5$6

Cache readUSD per 1M tokens, base tier

GPT-5.4$0.25

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 and Grok 4.5
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
GPT-5.4	OpenAI	Direct from developerUp to 272,000 context tokens	$2.5	$15	Source07/30/2026
	OpenAI	Direct from developerAbove 272,000 context tokens	$5	$22.5	Source07/30/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/us-east-1	$2.75	$16.5	Source09/07/2026
	Azure	Via OpenRouterazure	$2.5	$15	Source09/07/2026
	Azure	Via OpenRouterazure/eu	$2.75	$16.5	Source09/07/2026
	Azure	Via OpenRouterazure/us	$2.75	$16.5	Source09/07/2026
	OpenAI	Via OpenRouteropenai	$2.5	$15	Source09/07/2026
	OpenAI	Via OpenRouteropenai/fast	$5	$30	Source09/07/2026
	OpenAI	Via OpenRouteropenai/flex	Lowest listed price: $1.25	Lowest listed price: $7.5	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

Grok 4.5

Coding: 96.6 / 100 (6 benchmark families)

Reasoning: 99.1 / 100 (2 benchmark families)

Mathematics: 98.8 / 100 (1 benchmark family)

Knowledge: 98.8 / 100 (2 benchmark families)

Finance: 99.2 / 96.7 (4 benchmark families)

Legal: 66.7 / 99.9 (3 benchmark families)

Agentic tasks: 78.3 / 100 (1 benchmark family)

Multimodal: 100 / 70.6 (1 benchmark family)

46 matched rows from 18 benchmark families were considered. The radar shows 8 of 11 comparable categories.

GPT-5.4Grok 4.5

Code MigrationOverall. Higher is better. No documented setup difference

GPT-5.434.984 %

Grok 4.536.596 %

CorpFin v2Overall. Higher is better. No documented setup difference

GPT-5.465.268 %

Grok 4.567.405 %

GPQA DiamondOverall. Higher is better. No documented setup difference

GPT-5.491.666 %

Grok 4.592.929 %

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

GPT-5.40 %

Grok 4.512.917 %

LegalBenchOverall. Higher is better. No documented setup difference

GPT-5.486.044 %

Grok 4.585.965 %

LiveCodeBench v6Overall. Higher is better. No documented setup difference

GPT-5.484.141 %

Grok 4.587.351 %

LMArena Text, Style ControlOverall. Higher is better. No documented setup difference

GPT-5.41,465.527

Grok 4.51,470.015

MedCodeOverall. Higher is better. No documented setup difference

GPT-5.441.292 %

Grok 4.543.291 %

MedScribeOverall. Higher is better. No documented setup difference

GPT-5.477.549 %

Grok 4.586.884 %

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

GPT-5.487.482 %

Grok 4.589.216 %

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

GPT-5.487.514 %

Grok 4.561.792 %

MortgageTaxOverall. Higher is better. No documented setup difference

GPT-5.468.323 %

Grok 4.561.804 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.4 and Grok 4.5
Benchmark and task	GPT-5.4	Grok 4.5	Source
Code MigrationOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	34.984 %	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: Snapshot: gpt-5.4-2026-03-05	65.268 %	Winner67.405 %	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 betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	91.666 %	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: Snapshot: gpt-5.4-2026-03-05	0 %	Winner12.917 %	Vals AI Source details Data as of: 09/03/2026
LegalBenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	Winner86.044 %	85.965 %	Vals AI Source details Data as of: 09/01/2026
LiveCodeBench v6Overall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	84.141 %	Winner87.351 %	Vals AI Source details Data as of: 09/01/2026
LMArena Text, Style ControlOverall Test details No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4: Style-controlled Arena rating from 63,615 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 25,873 anonymous pairwise votes.	1,465.527 95% confidence interval: ±3.807The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	No clear lead1,470.015 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
MedCodeOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	41.292 %	Winner43.291 %	Vals AI Source details Data as of: 09/03/2026
MedScribeOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	77.549 %	Winner86.884 %	Vals AI Source details Data as of: 09/03/2026
MMLU-ProOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	87.482 %	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: Snapshot: gpt-5.4-2026-03-05	Winner87.514 %	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: Snapshot: gpt-5.4-2026-03-05	Winner68.323 %	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: Snapshot: gpt-5.4-2026-03-05	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: Snapshot: gpt-5.4-2026-03-05	Winner43.312 %	34.967 %	Vals AI Source details Data as of: 09/03/2026
SkillsBenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Harness: OpenHands Grok 4.5: Harness: OpenHands	51.711 %	Winner66.034 %	Vals AI Source details Data as of: 09/01/2026
SWE-bench VerifiedOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05	78.2 %	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: Snapshot: gpt-5.4-2026-03-05	Winner73.958 %	71.668 %	Vals AI Source details Data as of: 09/01/2026
Vibe Code Bench v1.1Overall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Harness: OpenHands Grok 4.5: Harness: OpenHands	67.421 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	23.788 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	64.103 %	Higher measured value66.317 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	91.414 %	Higher measured value92.929 %	Vals AI Source details Data as of: 08/09/2026
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-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	76.449 %	Higher measured value87.319 %	Vals AI Source details Data as of: 08/07/2026
LegalBenchConclusion Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	88.939 %	Higher measured value89.507 %	Vals AI Source details Data as of: 08/09/2026
LiveCodeBench v6Easy Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	No direct winner99.068 %	No direct winner99.068 %	Vals AI Source details Data as of: 08/09/2026
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: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4: Style-controlled Arena rating from 60,657 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 25,873 anonymous pairwise votes.	Higher measured value1,476.488 95% confidence interval: ±3.881The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,470.015 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-ProBiology Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	92.887 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value75.994 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value7 %	4.5 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 30,000 tokens Grok 4.5: Reasoning: high, Temperature: 1, Top P: 0.95, Output limit: 30,000 tokens	21.428 %	Higher measured value32.54 %	Vals AI Source details Data as of: 08/09/2026
SkillsBenchNo Skills Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Harness: OpenHands, Temperature: 0.7, Top P: 0.95	Higher measured value48.905 %	48.808 %	Vals AI Source details Data as of: 08/07/2026
SWE-bench Verified<15 min fix Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	88.144 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value64.922 %	62.551 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	68.571 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	64.918 %	Higher measured value67.483 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	91.919 %	Higher measured value92.929 %	Vals AI Source details Data as of: 08/09/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, 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: 08/07/2026
LegalBenchInterpretation Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value83.921 %	83.22 %	Vals AI Source details Data as of: 08/09/2026
LiveCodeBench v6Hard Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	67.714 %	Higher measured value73.429 %	Vals AI Source details Data as of: 08/09/2026
LMArena Text, Style ControlBusiness, management and finance Test details No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4: Style-controlled Arena rating from 13,060 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 5,122 anonymous pairwise votes.	No clear lead1,474.871 95% confidence interval: ±6.534The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,465.734 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-ProBusiness Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	91.762 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	60.652 %	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: Snapshot: gpt-5.4-2026-03-05, 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: Snapshot: gpt-5.4-2026-03-05, 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 value70.988 %	59.568 %	Vals AI Source details Data as of: 08/09/2026
SkillsBenchWith Skills Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Harness: OpenHands, Temperature: 0.7, Top P: 0.95	51.711 %	Higher measured value66.034 %	Vals AI Source details Data as of: 08/07/2026
SWE-bench Verified>4 hours Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, 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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value82.993 %	80.785 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	3.632 / 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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	66.783 %	Higher measured value68.415 %	Vals AI Source details Data as of: 08/06/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	66.667 %	Higher measured value92.115 %	Vals AI Source details Data as of: 08/07/2026
LegalBenchIssue Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value90.526 %	90.129 %	Vals AI Source details Data as of: 08/09/2026
LiveCodeBench v6Medium Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	85.64 %	Higher measured value89.556 %	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: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4: Style-controlled Arena rating from 12,346 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 5,122 anonymous pairwise votes.	Higher measured value1,483.779 95% confidence interval: ±6.654The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,465.734 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-ProChemistry Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	91.078 %	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: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value68.596 %	65.246 %	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: Snapshot: gpt-5.4-2026-03-05, 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 value68.826 %	46.964 %	Vals AI Source details Data as of: 08/09/2026
SWE-bench Verified1-4 hours Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	50 %	Higher measured value73.81 %	Vals AI Source details Data as of: 08/08/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, 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: 08/07/2026
LegalBenchRhetoric Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	Higher measured value82.824 %	82.802 %	Vals AI Source details Data as of: 08/09/2026
LMArena Text, Style ControlChinese Test details No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style control Grok 4.5: Snapshot: grok-4.5, Harness: Arena text, style controlGPT-5.4: Style-controlled Arena rating from 3,684 anonymous pairwise votes.Grok 4.5: Style-controlled Arena rating from 1,737 anonymous pairwise votes.	1,494.074 95% confidence interval: ±10.702The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	No clear lead1,512.8 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-ProComputer Science Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	89.756 %	Higher measured value90.976 %	Vals AI Source details Data as of: 08/09/2026
SAGEPartial Differential Equations Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, 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 value39.683 %	25.397 %	Vals AI Source details Data as of: 08/09/2026
SWE-bench Verified15 min - 1 hour Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	76.245 %	Higher measured value83.525 %	Vals AI Source details Data as of: 08/08/2026
Harvey's Legal Agent BenchmarkBanking Finance · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	80.297 %	Higher measured value95.539 %	Vals AI Source details Data as of: 08/07/2026
LegalBenchRule Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens Grok 4.5: Reasoning: high, Temperature: 0.7, Top P: 0.95	84.008 %	Higher measured value84.168 %	Vals AI Source details Data as of: 08/09/2026
Key to the marks:better valuebetter, but not conclusivetie

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