Noometry

Model comparison

Claude Opus 4.8 vs Pixtral 12B

Claude Opus 4.8 has enough public results to be ranked (#13); Pixtral 12B does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Claude Opus 4.8 Anthropic

60.7

Rank #13 Confirmed

Pixtral 12B Mistral AI

31.3

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Claude Opus 4.8 scores higher in 1 category and Pixtral 12B in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in multimodal, where Claude Opus 4.8 leads 42.9 to 23.9.
  • Pixtral 12B is cheaper at $0.15 / $0.15 per million input/output tokens, against $5 / $25 for Claude Opus 4.8.
  • Claude Opus 4.8 accepts more context: 1M tokens versus 128K.
  • Pixtral 12B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.8Pixtral 12B
ProviderAnthropicMistral AI
Noometry Index60.731.3
Released2026-05-282024-09-01
WeightsProprietaryOpen
Context window1M128K
Max output128K128K
Input $ / M tokens$5$0.15
Output $ / M tokens$25$0.15
Results tracked652

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Category by category

Coding Not comparable

Claude Opus 4.8: 59.9 (#12), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
DeepSWE59%—
FrontierCode46.5%—
LMArena WebDev1556—
SciCode53.5%—
GSO47.1%—
WeirdML82.9%—
LMArena Coding1490—
ALE-Bench1,564—

Agentic & Tool Use Not comparable

Claude Opus 4.8: 47.6 (#11), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
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 Not comparable

Claude Opus 4.8: 64.7 (#16), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
ARC-AGI-272.1%—
SimpleBench64.8%—
Kagi LLM Benchmark88.8%—
NYT Connections (extended)91.1%—
ARC-AGI-192.5%—
CritPt20.9%—
Chess Puzzles34%—
EnigmaEval23.5%—
EBR-Bench28.6%—
LMArena Hard Prompts1482—
Mystery Game Puzzles36%—
DTBench94.9%—
LMCA57.5%—
Surface Evolver Bench87.5%—
Bench to the Future 30.14—
Epoch Capabilities Index158.21—
ForecastBench59.9—

Math Not comparable

Claude Opus 4.8: 78.4 (#13), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
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 (#29), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
GPQA Diamond91%—
SimpleQA Verified53%—
LMArena Expert1502—

Multimodal Claude Opus 4.8 leads

Claude Opus 4.8: 42.9 (#26), Pixtral 12B: 23.9 (#127)

BenchmarkClaude Opus 4.8Pixtral 12B
LMArena Vision12941009
GeoBench—37%
Blueprint-Bench 214.5%—
Furniture Assembly42.5%—
LMArena Document1475—

Multilingual Not comparable

Claude Opus 4.8: 55.2 (#33), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
LMArena Non-English1450—
LMArena Chinese1507—
LMArena French1481—
LMArena German1472—
LMArena Japanese1440—
LMArena Korean1432—
LMArena Russian1474—
LMArena Spanish1466—

Instruction Following Not comparable

Claude Opus 4.8: 77.4 (#24), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
LMArena Instruction Following1476—

Long Context Not comparable

Claude Opus 4.8: 45.4 (#35), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
LMArena Longer Query1483—

Writing & Preference Not comparable

Claude Opus 4.8: 72.0 (#16), Pixtral 12B: —

BenchmarkClaude Opus 4.8Pixtral 12B
LMArena Text1461—
LMArena Creative Writing1454—
EQ-Bench Creative Writing1840—
EQ-Bench 41281—
LMArena Multi-Turn1476—

Frequently asked questions

Is Claude Opus 4.8 better than Pixtral 12B?

Claude Opus 4.8 has enough public results to be ranked (#13); Pixtral 12B does not yet, so treat this comparison as directional.

Which is cheaper, Claude Opus 4.8 or Pixtral 12B?

Pixtral 12B is cheaper. It lists at $0.15 per million input tokens and $0.15 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 128K.

How many benchmarks do Claude Opus 4.8 and Pixtral 12B share?

1 benchmark has published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and Pixtral 12B has 2.

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