Noometry

Model comparison

Claude Opus 5 vs Mistral Small 3.2

Claude Opus 5 is the stronger model overall, scoring 67.8 to 31.2 on the Noometry Index. Mistral Small 3.2 costs 75× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

Last verified . 5 shared benchmarks.

Claude Opus 5 Anthropic

67.8

Rank #4 Confirmed

Mistral Small 3.2 Mistral AI

31.2

Rank #280 Confirmed

Summary

  • They share 5 benchmarks with published results for both. Claude Opus 5 scores higher in 4 categories and Mistral Small 3.2 in 0 categories; 4 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5 leads 86.2 to 26.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 98.9% for Claude Opus 5 and 30.3% for Mistral Small 3.2.
  • Mistral Small 3.2 is cheaper at $0.0938 / $0.25 per million input/output tokens, against $5 / $25 for Claude Opus 5.
  • Claude Opus 5 accepts more context: 1M tokens versus 256K.
  • Mistral Small 3.2 has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5Mistral Small 3.2
ProviderAnthropicMistral AI
Noometry Index67.831.2
Released2026-07-242025-06-20
WeightsProprietaryOpen
Context window1M256K
Max output128K16K
Input $ / M tokens$5$0.0938
Output $ / M tokens$25$0.25
Results tracked576

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Category by category

Coding Not comparable

Claude Opus 5: 67.5 (#5), Mistral Small 3.2: —

BenchmarkClaude Opus 5Mistral Small 3.2
DeepSWE73.6%—
FrontierCode53.4%—
CursorBench46.6%—
LMArena WebDev1691—
FrontierSWE52%—
SciCode56.4%—
WeirdML91.8%—
LMArena Coding1534—
ALE-Bench2,165—

Agentic & Tool Use Not comparable

Claude Opus 5: 55.6 (#1), Mistral Small 3.2: —

BenchmarkClaude Opus 5Mistral Small 3.2
APEX-Agents65.8%—
OSWorld 2.031.4%—
τ²-bench Banking48.7%—
PostTrainBench35%—
BALROG63.4%—
GBAEval79.6%—
GDP.pdf24%—
Vending-Bench 211,182—

Reasoning Claude Opus 5 leads

Claude Opus 5: 77.2 (#4), Mistral Small 3.2: 18.1 (#287)

BenchmarkClaude Opus 5Mistral Small 3.2
Chess Puzzles42%1%
Epoch Capabilities Index162.78131.74
ARC-AGI-290.4%—
SimpleBench80.6%—
Kagi LLM Benchmark—40.4%
NYT Connections (extended)94.3%—
ARC-AGI-197.5%—
CritPt29.1%—
EBR-Bench45.7%—
LMArena Hard Prompts1526—
Mystery Game Puzzles59%—
DTBench97.9%—
LMCA64.5%—
Bench to the Future 30.12—

Math Claude Opus 5 leads

Claude Opus 5: 86.2 (#8), Mistral Small 3.2: 26.3 (#260)

BenchmarkClaude Opus 5Mistral Small 3.2
OTIS Mock AIME 2024-202598.9%30.3%
FrontierMath (Tiers 1-3)85.6%—
FrontierMath Tier 473.2%—
ProofBench99%—
LMArena Math1531—

Knowledge Claude Opus 5 leads

Claude Opus 5: 66.8 (#9), Mistral Small 3.2: 26.7 (#256)

BenchmarkClaude Opus 5Mistral Small 3.2
GPQA Diamond93.9%49.1%
SimpleQA Verified59.9%—
LMArena Expert1557—

Multimodal Not comparable

Claude Opus 5: 50.8 (#8), Mistral Small 3.2: —

BenchmarkClaude Opus 5Mistral Small 3.2
LMArena Vision1319—
Blueprint-Bench 230.4%—
Furniture Assembly60.8%—
LMArena Document1516—

Multilingual Not comparable

Claude Opus 5: 58.8 (#4), Mistral Small 3.2: —

BenchmarkClaude Opus 5Mistral Small 3.2
LMArena Non-English1501—
LMArena Chinese1574—
LMArena French1519—
LMArena German1524—
LMArena Japanese1516—
LMArena Korean1521—
LMArena Russian1507—
LMArena Spanish1519—

Instruction Following Not comparable

Claude Opus 5: 79.2 (#7), Mistral Small 3.2: —

BenchmarkClaude Opus 5Mistral Small 3.2
LMArena Instruction Following1517—

Long Context Not comparable

Claude Opus 5: 46.5 (#21), Mistral Small 3.2: —

BenchmarkClaude Opus 5Mistral Small 3.2
LMArena Longer Query1515—

Writing & Preference Claude Opus 5 leads

Claude Opus 5: 79.2 (#1), Mistral Small 3.2: 45.0 (#224)

BenchmarkClaude Opus 5Mistral Small 3.2
EQ-Bench Creative Writing21331255
LMArena Text1507—
LMArena Creative Writing1491—
EQ-Bench 41385—
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5 better than Mistral Small 3.2?

Claude Opus 5 is the stronger model overall, scoring 67.8 to 31.2 on the Noometry Index. Mistral Small 3.2 costs 75× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5 or Mistral Small 3.2?

Mistral Small 3.2 is cheaper. It lists at $0.0938 per million input tokens and $0.25 per million output tokens; Claude Opus 5 lists at $5 and $25.

Which has the bigger context window?

Claude Opus 5 does, with 1M tokens against 256K.

How many benchmarks do Claude Opus 5 and Mistral Small 3.2 share?

5 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Mistral Small 3.2 has 6.

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