Noometry

Model comparison

Claude Opus 4.8 vs Mistral Small 4

Claude Opus 4.8 has enough public results to be ranked (#9); Mistral Small 4 does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Claude Opus 4.8 Anthropic

60.7

Rank #9 Confirmed

Mistral Small 4 Mistral AI

30.2

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Claude Opus 4.8 scores higher in 1 category and Mistral Small 4 in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 4.8 leads 64.6 to 21.2.
  • The biggest single-benchmark swing is Kagi LLM Benchmark: 88.8% for Claude Opus 4.8 and 40.5% for Mistral Small 4.
  • Mistral Small 4 is cheaper at $0.075 / $0.30 per million input/output tokens, against $5 / $25 for Claude Opus 4.8.
  • Claude Opus 4.8 accepts more context: 1M tokens versus 262K.
  • Mistral Small 4 has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.8Mistral Small 4
ProviderAnthropicMistral AI
Noometry Index60.730.2
Released2026-05-28—
WeightsProprietaryOpen
Context window1M262K
Max output128K210K
Input $ / M tokens$5$0.075
Output $ / M tokens$25$0.30
Results tracked651

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Category by category

Coding Not comparable

Claude Opus 4.8: 60.2 (#9), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
DeepSWE59%—
FrontierCode46.5%—
LMArena WebDev1556—
SciCode53.5%—
GSO47.1%—
WeirdML82.9%—
LMArena Coding1491—
ALE-Bench1,564—

Agentic & Tool Use Not comparable

Claude Opus 4.8: 47.6 (#10), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
APEX-Agents48.9%—
OSWorld 2.020.6%—
Remote Labor Index8.3%—
τ²-bench Banking39.7%—
DeepResearch Bench50.2%—
PostTrainBench33.8%—
GBAEval70.9%—
GDP.pdf24%—
LMArena Search1204—
Vending-Bench 25,787—

Reasoning Claude Opus 4.8 leads

Claude Opus 4.8: 64.6 (#14), Mistral Small 4: 21.2

BenchmarkClaude Opus 4.8Mistral Small 4
Kagi LLM Benchmark88.8%40.5%
ARC-AGI-272.1%—
SimpleBench64.8%—
NYT Connections (extended)91.1%—
ARC-AGI-192.5%—
CritPt20.9%—
Chess Puzzles34%—
EnigmaEval23.5%—
EBR-Bench28.6%—
LMArena Hard Prompts1481—
Mystery Game Puzzles36%—
DTBench94.9%—
LMCA57.5%—
Surface Evolver Bench87.5%—
Bench to the Future 30.14—
Epoch Capabilities Index158.3—
ForecastBench59.9—

Math Not comparable

Claude Opus 4.8: 78.2 (#11), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
FrontierMath (Tiers 1-3)80%—
FrontierMath Tier 456.1%—
MathArena Final-Answer Competitions91.8%—
OTIS Mock AIME 2024-202598.3%—
ProofBench69%—
LMArena Math1487—
FrontierMath (Feb 2025 set)47.2%—
FrontierMath Tier 4 (v1)31.3%—

Knowledge Not comparable

Claude Opus 4.8: 61.3 (#26), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
GPQA Diamond91%—
SimpleQA Verified53%—
LMArena Expert1501—

Multimodal Not comparable

Claude Opus 4.8: 43.2 (#20), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
LMArena Vision1295—
Blueprint-Bench 214.5%—
Furniture Assembly42.5%—
LMArena Document1475—

Multilingual Not comparable

Claude Opus 4.8: 55.4 (#31), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
LMArena Non-English1450—
LMArena Chinese1509—
LMArena French1482—
LMArena German1470—
LMArena Japanese1440—
LMArena Korean1432—
LMArena Russian1476—
LMArena Spanish1470—

Instruction Following Not comparable

Claude Opus 4.8: 77.6 (#22), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
LMArena Instruction Following1476—

Long Context Not comparable

Claude Opus 4.8: 45.4 (#37), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
LMArena Longer Query1482—

Writing & Preference Not comparable

Claude Opus 4.8: 72.1 (#17), Mistral Small 4: —

BenchmarkClaude Opus 4.8Mistral Small 4
LMArena Text1460—
LMArena Creative Writing1453—
EQ-Bench Creative Writing1840—
EQ-Bench 41281—
LMArena Multi-Turn1476—

Frequently asked questions

Is Claude Opus 4.8 better than Mistral Small 4?

Claude Opus 4.8 has enough public results to be ranked (#9); Mistral Small 4 does not yet, so treat this comparison as directional.

Which is cheaper, Claude Opus 4.8 or Mistral Small 4?

Mistral Small 4 is cheaper. It lists at $0.075 per million input tokens and $0.30 per million output tokens; Claude Opus 4.8 lists at $5 and $25.

Which has the bigger context window?

Claude Opus 4.8 does, with 1M tokens against 262K.

How many benchmarks do Claude Opus 4.8 and Mistral Small 4 share?

1 benchmark has published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and Mistral Small 4 has 1.

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