Head-to-head comparison

Gemini 3.1 Pro Preview 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: 49
distinct benchmarks: 22
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 Gemini 3.1 Pro Preview and Mistral Medium 3.5
Attribute	Gemini 3.1 Pro Preview	Mistral Medium 3.5
Provider	Google	Mistral AI
Released	Feb 19, 2026	Apr 28, 2026
Availability	Preview	Active
Model type	Proprietary	Open Weights
Parameters	Not published	128B
Architecture	Not published	Dense
Context window	1,048,576 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 Gemini 3.1 Pro Preview and Mistral Medium 3.5
Price type	Gemini 3.1 Pro Preview	Mistral Medium 3.5
API input	$2 ≤200K / $4 >200K	$1.5
API output	$12 ≤200K / $18 >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

Gemini 3.1 Pro PreviewMistral Medium 3.5

API inputUSD per 1M tokens, base tier

Gemini 3.1 Pro Preview$2

Mistral Medium 3.5$1.5

API outputUSD per 1M tokens, base tier

Gemini 3.1 Pro Preview$12

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 Gemini 3.1 Pro Preview and Mistral Medium 3.5
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
Gemini 3.1 Pro Preview	Google	Direct from developerUp to 200,000 context tokens	$2	$12	Source09/22/2026
	Google	Direct from developerAbove 200,000 context tokens	$4	$18	Source09/22/2026
	Google	Via OpenRoutergoogle-vertex/global	$2	$12	Source10/02/2026
	Google	Via OpenRoutergoogle-vertex/global/flex	Lowest listed price: $1	Lowest listed price: $6	Source10/02/2026
	Google	Via OpenRoutergoogle-vertex/global/priority	$3.6	$21.6	Source10/02/2026
	Google AI Studio	Via OpenRoutergoogle-ai-studio	$2	$12	Source10/02/2026
	Google AI Studio	Via OpenRoutergoogle-ai-studio/flex	Lowest listed price: $1	Lowest listed price: $6	Source10/02/2026
	Google AI Studio	Via OpenRoutergoogle-ai-studio/priority	$3.6	$21.6	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.

Gemini 3.1 Pro Preview

Mistral Medium 3.5

Coding: 100 / 55 (4 benchmark families)

Reasoning: 100 / 66.2 (2 benchmark families)

Mathematics: 100 / 65.5 (2 benchmark families)

Knowledge: 100 / 89 (2 benchmark families)

Finance: 100 / 70.1 (7 benchmark families)

Legal: 66.7 / 80 (3 benchmark families)

Agentic tasks: 100 / 50 (1 benchmark family)

Health: 100 / 80.2 (3 benchmark families)

49 matched rows from 21 benchmark families were considered. The radar shows 8 of 11 comparable categories.

Gemini 3.1 Pro PreviewMistral Medium 3.5

Code MigrationOverall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview17.313 %

Mistral Medium 3.55.127 %

CorpFin v2Overall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview64.491 %

Mistral Medium 3.558.78 %

EMBOverall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview52.616 %

Mistral Medium 3.511.185 %

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

Gemini 3.1 Pro Preview42.982 %

Mistral Medium 3.532.103 %

GPQA DiamondOverall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview95.454 %

Mistral Medium 3.534.848 %

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

Gemini 3.1 Pro Preview0 %

Mistral Medium 3.50.417 %

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

Gemini 3.1 Pro Preview20.673 %

Mistral Medium 3.59.135 %

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

Gemini 3.1 Pro Preview1,486.678

Mistral Medium 3.51,426.128

MedCodeOverall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview59.062 %

Mistral Medium 3.533.752 %

MedScribeOverall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview76.114 %

Mistral Medium 3.567.728 %

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

Gemini 3.1 Pro Preview90.987 %

Mistral Medium 3.575.335 %

MortgageTaxOverall. Higher is better. No documented setup difference

Gemini 3.1 Pro Preview69.396 %

Mistral Medium 3.528.895 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Gemini 3.1 Pro Preview and Mistral Medium 3.5
Benchmark and task	Gemini 3.1 Pro Preview	Mistral Medium 3.5	Source
Code MigrationOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner17.313 %	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	Winner64.491 %	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	Winner52.616 %	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	Winner42.982 %	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	Winner95.454 %	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	0 %	Winner0.417 %	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	Winner20.673 %	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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 119,196 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 11,693 anonymous pairwise votes.	Winner1,486.678 95% confidence interval: ±3.034The 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	Winner59.062 %	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	Winner76.114 %	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	Winner90.987 %	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	Winner69.396 %	28.895 %	Vals AI Source details Data as of: 09/01/2026
ProofBenchOverall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is better	Winner26 %	9 %	Vals AI Source details Data as of: 09/28/2026
SAGEOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner48.677 %	37.613 %	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	Winner78.8 %	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	Winner37.842 %	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	Winner72.882 %	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	Winner67.416 %	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	Winner70.787 %	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	Winner41.903 %	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	Winner56.068 %	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	Winner32.034 %	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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 23,398 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,256 anonymous pairwise votes.	Winner1,477.195 95% confidence interval: ±5.145The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 8,183 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 621 anonymous pairwise votes.	Winner1,528.226 95% confidence interval: ±7.531The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 33,049 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,282 anonymous pairwise votes.	Winner1,520.753 95% confidence interval: ±4.686The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 21,305 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,999 anonymous pairwise votes.	Winner1,480.249 95% confidence interval: ±5.535The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 52,351 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 5,562 anonymous pairwise votes.	Winner1,490.425 95% confidence interval: ±4.036The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 27,013 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,618 anonymous pairwise votes.	Winner1,468.352 95% confidence interval: ±5.112The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 89,549 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 8,856 anonymous pairwise votes.	Winner1,501.183 95% confidence interval: ±4.1The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 12,336 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,205 anonymous pairwise votes.	Winner1,509.102 95% confidence interval: ±6.452The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 3,917 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 453 anonymous pairwise votes.	Winner1,502.238 95% confidence interval: ±11.678The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 1,979 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 173 anonymous pairwise votes.	No clear lead1,494.051 95% confidence interval: ±14.89The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,447.96 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 77,865 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 7,627 anonymous pairwise votes.	Winner1,506.78 95% confidence interval: ±3.69The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 35,115 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,821 anonymous pairwise votes.	Winner1,506.509 95% confidence interval: ±4.646The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 40,860 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,827 anonymous pairwise votes.	Winner1,479.375 95% confidence interval: ±4.393The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,420.763 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 2,108 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 188 anonymous pairwise votes.	Winner1,457.196 95% confidence interval: ±14.845The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 9,836 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 893 anonymous pairwise votes.	Winner1,499.637 95% confidence interval: ±7.024The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 19,920 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,939 anonymous pairwise votes.	Winner1,511.137 95% confidence interval: ±5.358The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 52,750 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 5,065 anonymous pairwise votes.	Winner1,498.801 95% confidence interval: ±4.296The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 6,192 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 565 anonymous pairwise votes.	Winner1,488.145 95% confidence interval: ±8.229The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,428.606 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 6,656 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 653 anonymous pairwise votes.	Winner1,484.192 95% confidence interval: ±8.227The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.	1,438.481 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 8,930 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 844 anonymous pairwise votes.	Winner1,505.263 95% confidence interval: ±7.351The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 20,555 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,925 anonymous pairwise votes.	Winner1,496.036 95% confidence interval: ±5.404The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 66,835 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 6,131 anonymous pairwise votes.	Winner1,478.238 95% confidence interval: ±3.741The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 2,318 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 235 anonymous pairwise votes.	Winner1,493.373 95% confidence interval: ±12.764The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 13,461 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,242 anonymous pairwise votes.	Winner1,500.375 95% confidence interval: ±6.15The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 47,251 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 4,587 anonymous pairwise votes.	Winner1,511.854 95% confidence interval: ±4.177The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 3,879 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 393 anonymous pairwise votes.	Winner1,482.143 95% confidence interval: ±10.938The 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 betterGemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlGemini 3.1 Pro Preview: Style-controlled Arena rating from 29,992 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,919 anonymous pairwise votes.	Winner1,480.326 95% confidence interval: ±4.855The 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.

Gemini 3.1 Pro Preview

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: google/gemini-3.1-pro-preview
Reasoning setting: high
Pinned endpoint: Google AI Studio | google/gemini-3.1-pro-preview-20260219
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.

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 Gemini 3.1 Pro Preview and Mistral Medium 3.5 with other leading models using the same data and benchmark logic.

View the complete LLM comparison