Head-to-head comparison

Grok 4.3 vs. Mistral Medium 3.5

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

shared result series: 48
distinct benchmarks: 21
latest retrieval: 2026-09-29

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 Grok 4.3 and Mistral Medium 3.5
Attribute	Grok 4.3	Mistral Medium 3.5
Provider	xAI	Mistral AI
Released	May 6, 2026	Apr 28, 2026
Availability	Active	Active
Model type	Proprietary	Open Weights
Parameters	Not published	128B
Architecture	Not published	Dense
Context window	1,000,000 tokens	262,144 tokens
Knowledge cutoff	Not published	Not published
Technical sources	Model	Model, 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 Grok 4.3 and Mistral Medium 3.5
Price type	Grok 4.3	Mistral Medium 3.5
API input	$1.25 ≤200K / $2.5 >200K	$1.5
API output	$2.5 ≤200K / $5 >200K	$7.5
Cache read	$0.2 ≤200K / $0.4 >200K	Not listed
Cache write (5 min.)	Not listed	Not listed
Cache write (1 hr.)	Not listed	Not listed
Price verified	09/22/2026 Source	09/22/2026 Source

Grok 4.3Mistral Medium 3.5

API inputUSD per 1M tokens, base tier

Grok 4.3$1.25

Mistral Medium 3.5$1.5

API outputUSD per 1M tokens, base tier

Grok 4.3$2.5

Mistral Medium 3.5$7.5

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 Grok 4.3 and Mistral Medium 3.5
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
Grok 4.3	xAI	Direct from developerUp to 200,000 context tokens	Lowest listed price: $1.25	Lowest listed price: $2.5	Source09/22/2026
	xAI	Direct from developerAbove 200,000 context tokens	$2.5	$5	Source09/22/2026
	xAI	Via OpenRouterxai	Lowest listed price: $1.25	Lowest listed price: $2.5	Source10/02/2026
	xAI	Via OpenRouterxai/priority	$2.5	$5	Source10/02/2026
	xAI	Via OpenRouterxai/zdr	Lowest listed price: $1.25	Lowest listed price: $2.5	Source10/02/2026
	xAI	Via OpenRouterxai/zdr/priority	$2.5	$5	Source10/02/2026
Mistral Medium 3.5	Mistral AI	Direct from developerStandard API	Lowest listed price: $1.5	Lowest listed price: $7.5	Source09/22/2026
	Mistral	Via OpenRoutermistral	Lowest listed price: $1.5	Lowest listed price: $7.5	Source10/02/2026
	Mistral	Via OpenRoutermistral/eu	$1.65	$8.25	Source10/02/2026
	Mistral	Via OpenRoutermistral/zdr	Lowest listed price: $1.5	Lowest listed price: $7.5	Source10/02/2026

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.

Grok 4.3

Mistral Medium 3.5

Coding: 100 / 70.7 (4 benchmark families)

Reasoning: 100 / 68.6 (2 benchmark families)

Mathematics: 99.4 / 100 (1 benchmark family)

Knowledge: 100 / 93.4 (2 benchmark families)

Finance: 100 / 80.9 (7 benchmark families)

Legal: 100 / 86.4 (3 benchmark families)

Agentic tasks: 100 / 81.3 (1 benchmark family)

Health: 100 / 92.5 (3 benchmark families)

48 matched rows from 20 benchmark families were considered. The radar shows 8 of 11 comparable categories.

Grok 4.3Mistral Medium 3.5

Code MigrationOverall. Higher is better. No documented setup difference

Grok 4.36.795 %

Mistral Medium 3.55.127 %

CorpFin v2Overall. Higher is better. No documented setup difference

Grok 4.368.532 %

Mistral Medium 3.558.78 %

EMBOverall. Higher is better. No documented setup difference

Grok 4.318.394 %

Mistral Medium 3.511.185 %

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

Grok 4.337.728 %

Mistral Medium 3.532.103 %

GPQA DiamondOverall. Higher is better. No documented setup difference

Grok 4.391.414 %

Mistral Medium 3.534.848 %

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

Grok 4.30.417 %

Mistral Medium 3.50.417 %

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

Grok 4.315.385 %

Mistral Medium 3.59.135 %

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

Grok 4.31,441.593

Mistral Medium 3.51,426.128

MedCodeOverall. Higher is better. No documented setup difference

Grok 4.338.068 %

Mistral Medium 3.533.752 %

MedScribeOverall. Higher is better. No documented setup difference

Grok 4.374.399 %

Mistral Medium 3.567.728 %

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

Grok 4.385.838 %

Mistral Medium 3.575.335 %

MortgageTaxOverall. Higher is better. No documented setup difference

Grok 4.348.252 %

Mistral Medium 3.528.895 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Grok 4.3 and Mistral Medium 3.5
Benchmark and task	Grok 4.3	Mistral Medium 3.5	Source
Code MigrationOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner6.795 %	5.127 %	Vals AI Source details Data as of: 09/27/2026
CorpFin v2Overall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better	Winner68.532 %	58.78 %	Vals AI Source details Data as of: 08/12/2026
EMBOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner18.394 %	11.185 %	Vals AI Source details Data as of: 09/27/2026
Finance Agent (v2)Overall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better	Winner37.728 %	32.103 %	Vals AI Source details Data as of: 09/27/2026
GPQA DiamondOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner91.414 %	34.848 %	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 better	Tie0.417 %	Tie0.417 %	Vals AI Source details Data as of: 09/27/2026
Legal Research BenchOverall · All-pass Test details No documented difference in the test setupVersion: 1Metric: all-pass rateScoring: Higher is better	Winner15.385 %	9.135 %	Vals AI Source details Data as of: 09/27/2026
LMArena Text, Style ControlOverall Test details No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 71,054 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 11,693 anonymous pairwise votes.	Winner1,441.593 95% confidence interval: ±3.641The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,426.128 95% confidence interval: ±6.42The 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
MedCodeOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner38.068 %	33.752 %	Vals AI Source details Data as of: 09/26/2026
MedScribeOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner74.399 %	67.728 %	Vals AI Source details Data as of: 09/26/2026
MMLU-ProOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner85.838 %	75.335 %	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	Winner48.252 %	28.895 %	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	19.736 %	Winner37.613 %	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	Winner71.4 %	66.4 %	Vals AI Source details Data as of: 09/01/2026
Tax Agent BenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner34.416 %	27.291 %	Vals AI Source details Data as of: 09/27/2026
TaxEval v2Overall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better	Winner70.81 %	67.988 %	Vals AI Source details Data as of: 09/01/2026
Terminal-Bench 2.0Overall Test details No documented difference in the test setupVersion: 2.0Metric: accuracyScoring: Higher is better	Winner43.446 %	30.337 %	Vals AI Source details Data as of: 06/04/2026
Terminal-Bench 2.1Overall Test details No documented difference in the test setupVersion: 2.1Metric: accuracyScoring: Higher is better	Winner41.948 %	38.951 %	Vals AI Source details Data as of: 09/27/2026
Vals IndexOverall Test details No documented difference in the test setupVersion: 2Metric: weighted index scoreScoring: Higher is better	Winner24.294 %	17.947 %	Vals AI Source details Data as of: 09/27/2026
Vals Multimodal IndexOverall Test details No documented difference in the test setupVersion: 1.2Metric: weighted index scoreScoring: Higher is better	Winner43.293 %	34.768 %	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 betterSettings: Harness: OpenHands	Winner19.403 %	2.888 %	Vals AI Source details Data as of: 09/27/2026
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 betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 14,291 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,256 anonymous pairwise votes.	No clear lead1,439.761 95% confidence interval: ±6.298The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,430.173 95% confidence interval: ±12.827The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 4,531 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 621 anonymous pairwise votes.	No clear lead1,477.707 95% confidence interval: ±9.633The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,446.524 95% confidence interval: ±23.931The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 19,949 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,282 anonymous pairwise votes.	No clear lead1,488.001 95% confidence interval: ±5.656The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,477.898 95% confidence interval: ±10.854The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 12,909 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,999 anonymous pairwise votes.	Winner1,422.565 95% confidence interval: ±6.566The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,397.828 95% confidence interval: ±13.94The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 32,389 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 5,562 anonymous pairwise votes.	No clear lead1,451.053 95% confidence interval: ±4.742The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,442.84 95% confidence interval: ±8.53The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 16,950 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,618 anonymous pairwise votes.	Winner1,415.952 95% confidence interval: ±5.995The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,394.24 95% confidence interval: ±12.151The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 54,500 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 8,856 anonymous pairwise votes.	Winner1,440.278 95% confidence interval: ±4.803The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,419.562 95% confidence interval: ±8.482The 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 ControlExpert prompts Test details No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 7,511 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,205 anonymous pairwise votes.	No clear lead1,452.353 95% confidence interval: ±7.918The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,433.7 95% confidence interval: ±17.235The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 2,579 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 453 anonymous pairwise votes.	No clear lead1,462.083 95% confidence interval: ±13.943The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,435.855 95% confidence interval: ±29.943The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 1,041 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 173 anonymous pairwise votes.	1,439.453 95% confidence interval: ±19.291The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	No clear lead1,447.96 95% confidence interval: ±43.885The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 47,683 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 7,627 anonymous pairwise votes.	No clear lead1,456.21 95% confidence interval: ±4.348The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,444.677 95% confidence interval: ±7.686The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 22,338 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,821 anonymous pairwise votes.	No clear lead1,462.76 95% confidence interval: ±5.485The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,455.806 95% confidence interval: ±10.148The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 25,157 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,827 anonymous pairwise votes.	1,414.928 95% confidence interval: ±5.274The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	No clear lead1,420.763 95% confidence interval: ±10.011The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 1,126 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 188 anonymous pairwise votes.	No clear lead1,406.339 95% confidence interval: ±19.258The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,392.677 95% confidence interval: ±43.291The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 5,787 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 893 anonymous pairwise votes.	No clear lead1,438.605 95% confidence interval: ±8.8The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,437.755 95% confidence interval: ±20.721The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 11,811 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,939 anonymous pairwise votes.	Winner1,457.152 95% confidence interval: ±6.629The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,435.825 95% confidence interval: ±13.971The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 33,192 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 5,065 anonymous pairwise votes.	Winner1,443.332 95% confidence interval: ±5.001The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,428.117 95% confidence interval: ±9.119The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 3,404 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 565 anonymous pairwise votes.	1,419.092 95% confidence interval: ±10.768The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	No clear lead1,428.606 95% confidence interval: ±24.143The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 3,921 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 653 anonymous pairwise votes.	1,431.793 95% confidence interval: ±10.225The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	No clear lead1,438.481 95% confidence interval: ±22.896The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 5,339 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 844 anonymous pairwise votes.	No clear lead1,450.98 95% confidence interval: ±9.194The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,421.161 95% confidence interval: ±21.257The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 12,874 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,925 anonymous pairwise votes.	No clear lead1,447.044 95% confidence interval: ±6.532The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,432.256 95% confidence interval: ±14.007The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 38,664 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 6,131 anonymous pairwise votes.	Winner1,428.048 95% confidence interval: ±4.521The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,406.139 95% confidence interval: ±8.159The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 1,205 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 235 anonymous pairwise votes.	No clear lead1,444.892 95% confidence interval: ±17.617The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,415.979 95% confidence interval: ±38.135The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 7,515 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,242 anonymous pairwise votes.	Winner1,440.06 95% confidence interval: ±7.682The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,410.34 95% confidence interval: ±17.157The 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 No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 28,553 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 4,587 anonymous pairwise votes.	No clear lead1,479.419 95% confidence interval: ±5.003The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,468.806 95% confidence interval: ±9.304The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 2,048 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 393 anonymous pairwise votes.	Winner1,441.644 95% confidence interval: ±14.576The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,392.394 95% confidence interval: ±31.573The 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 No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGrok 4.3: Snapshot: grok-4.3, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGrok 4.3: Style-controlled Arena rating from 18,396 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,919 anonymous pairwise votes.	Winner1,423.851 95% confidence interval: ±5.775The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,403.766 95% confidence interval: ±11.409The 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.

Grok 4.3

Reasoning (requested): high

First attempt

Run date: 7 Sept 2026
API provider: openrouter
Requested API model: x-ai/grok-4.3
API model reported in response: x-ai/grok-4.3
Reasoning setting: high
Pinned endpoint: xAI | x-ai/grok-4.3-20260430
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: 149 s

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

Mistral Medium 3.5

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

Reasoning (requested): high

First attempt

Run date: 7 Sept 2026
API provider: openrouter
Requested API model: mistralai/mistral-medium-3-5
Reasoning setting: high
Pinned endpoint: Mistral | mistralai/mistral-medium-3.5-20260430
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 Grok 4.3 and Mistral Medium 3.5 with other leading models using the same data and benchmark logic.

View the complete LLM comparison