Noometry

Model comparison

Gemini 3.1 Pro Preview vs Mistral Medium 3.1

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 5.6× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

Last verified . 3 shared benchmarks.

Gemini 3.1 Pro Preview Google

56.7

Rank #23 Confirmed

Mistral Medium 3.1 Mistral AI

31.9

Rank #266 Reported

Summary

  • They share 3 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 2 categories and Mistral Medium 3.1 in 0 categories; 2 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 10.6.
  • The biggest single-benchmark swing is NYT Connections (extended): 97.4% for Gemini 3.1 Pro Preview and 6.5% for Mistral Medium 3.1.
  • Mistral Medium 3.1 is cheaper at $0.40 / $2 per million input/output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
  • Gemini 3.1 Pro Preview accepts more context: 1.05M tokens versus 131K.

Side by side

Gemini 3.1 Pro PreviewMistral Medium 3.1
ProviderGoogleMistral AI
Noometry Index56.731.9
Released2026-02-19—
WeightsProprietaryProprietary
Context window1.05M131K
Max output66K105K
Input $ / M tokens$2$0.40
Output $ / M tokens$12$2
Results tracked713

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Category by category

Coding Not comparable

Gemini 3.1 Pro Preview: 42.5 (#99), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
SWE-bench Verified75.6%—
DeepSWE11.7%—
LMArena WebDev1447—
SciCode58.9%—
GSO22.6%—
WeirdML72.1%—
LMArena Coding1484—
MirrorCode8.9%—
ALE-Bench1,161—
AlgoTune2.02—

Agentic & Tool Use Not comparable

Gemini 3.1 Pro Preview: 37.7 (#34), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
Terminal-Bench80.2%—
APEX-Agents35.3%—
τ²-bench Banking26%—
DeepResearch Bench47.8%—
PostTrainBench22%—
BALROG57%—
ExploitBench26.1%—
GBAEval0.8%—
GDP.pdf17%—
LMArena Search1211—
METR Time Horizons77%—
Vending-Bench 23,774—

Reasoning Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 71.7 (#12), Mistral Medium 3.1: 10.6 (#341)

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
NYT Connections (extended)97.4%6.5%
Thematic Generalization79.4%20.3%
ARC-AGI-277.1%—
SimpleBench79.6%—
ARC-AGI-198%—
CritPt17.7%—
Chess Puzzles55%—
EnigmaEval36.8%—
EBR-Bench14.3%—
LMArena Hard Prompts1485—
Mystery Game Puzzles34%—
DTBench97.1%—
LMCA53.8%—
Epoch Capabilities Index154.77—
ForecastBench59—

Math Not comparable

Gemini 3.1 Pro Preview: 62.1 (#34), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
FrontierMath (Tiers 1-3)59.6%—
FrontierMath Tier 426.8%—
MathArena Final-Answer Competitions86.5%—
OTIS Mock AIME 2024-202595.6%—
ProofBench26%—
LMArena Math1485—
FrontierMath (Feb 2025 set)36.9%—
FrontierMath Tier 4 (v1)16.7%—

Knowledge Not comparable

Gemini 3.1 Pro Preview: 71.8 (#3), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
GPQA Diamond94.4%—
Humanity's Last Exam46.4%—
SimpleQA Verified73.5%—
Vectara Hallucination Rate10.4%—
LMArena Expert1485—

Multimodal Not comparable

Gemini 3.1 Pro Preview: 37.9 (#69), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
LMArena Vision1296—
Blueprint-Bench 226.5%—
Furniture Assembly26.7%—
LMArena Document1444—

Multilingual Not comparable

Gemini 3.1 Pro Preview: 57.0 (#12), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
LMArena Non-English1477—
LMArena Chinese1529—
LMArena French1487—
LMArena German1491—
LMArena Japanese1493—
LMArena Korean1455—
LMArena Russian1498—
LMArena Spanish1479—

Instruction Following Not comparable

Gemini 3.1 Pro Preview: 77.0 (#32), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
LMArena Instruction Following1466—

Long Context Not comparable

Gemini 3.1 Pro Preview: 47.4 (#18), Mistral Medium 3.1: —

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
CL-bench20.8%—
CL-bench Life16.9%—
LMArena Longer Query1483—

Writing & Preference Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 66.1 (#37), Mistral Medium 3.1: 55.5 (#145)

BenchmarkGemini 3.1 Pro PreviewMistral Medium 3.1
EQ-Bench Creative Writing14911476
LMArena Text1481—
LMArena Creative Writing1482—
EQ-Bench 41142—
LMArena Multi-Turn1488—

Frequently asked questions

Is Gemini 3.1 Pro Preview better than Mistral Medium 3.1?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 5.6× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

Which is cheaper, Gemini 3.1 Pro Preview or Mistral Medium 3.1?

Mistral Medium 3.1 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; Gemini 3.1 Pro Preview lists at $2 and $12.

Which has the bigger context window?

Gemini 3.1 Pro Preview does, with 1.05M tokens against 131K.

How many benchmarks do Gemini 3.1 Pro Preview and Mistral Medium 3.1 share?

3 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Mistral Medium 3.1 has 3.

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