Noometry

Model comparison

Claude Sonnet 5.5 vs Pixtral Large

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 32.2 on the Noometry Index.

Last verified . 1 shared benchmarks.

Claude Sonnet 5.5 Anthropic

61.9

Rank #10 Confirmed

Pixtral Large Mistral AI

32.2

Rank #259 Reported

Summary

  • They share 1 benchmark with published results for both. Claude Sonnet 5.5 scores higher in 3 categories and Pixtral Large in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where Claude Sonnet 5.5 leads 66.0 to 32.9.
  • Pixtral Large is cheaper at $2 / $6 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
  • Claude Sonnet 5.5 accepts more context: 1M tokens versus 128K.
  • Pixtral Large has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 5.5Pixtral Large
ProviderAnthropicMistral AI
Noometry Index61.932.2
Released2026-09-282024-11-01
WeightsProprietaryOpen
Context window1M128K
Max output128K128K
Input $ / M tokens$2$2
Output $ / M tokens$10$6
Results tracked323

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Category by category

Coding Not comparable

Claude Sonnet 5.5: 67.3 (#6), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
FrontierCode52.1%—
CursorBench55.5%—
LMArena WebDev1774—
FrontierSWE61.9%—
SciCode61%—
LMArena Coding1513—
ALE-Bench1,819—

Agentic & Tool Use Not comparable

Claude Sonnet 5.5: 45.0 (#16), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
APEX-Agents75.5%—

Reasoning Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 54.0 (#28), Pixtral Large: 21.7 (#218)

BenchmarkClaude Sonnet 5.5Pixtral Large
NYT Connections (extended)80.5%—
CritPt31.4%—
EnigmaEval—0.8%
LMArena Hard Prompts1495—
Mystery Game Puzzles65%—
Epoch Capabilities Index165.03—

Math Not comparable

Claude Sonnet 5.5: 87.9 (#6), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
FrontierMath (Tiers 1-3)88.8%—
FrontierMath Tier 480.5%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math1510—
FrontierMath Erdős2.9%—

Knowledge Not comparable

Claude Sonnet 5.5: 66.0 (#12), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
GPQA Diamond95.6%—
SimpleQA Verified46.5%—
LMArena Expert1540—

Multimodal Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 51.5 (#6), Pixtral Large: 30.6 (#111)

BenchmarkClaude Sonnet 5.5Pixtral Large
LMArena Vision12891089
Furniture Assembly75%—

Multilingual Not comparable

Claude Sonnet 5.5: 55.3 (#30), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
LMArena Non-English1452—
LMArena Chinese1522—
LMArena Russian1451—

Instruction Following Not comparable

Claude Sonnet 5.5: 78.3 (#11), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
LMArena Instruction Following1495—

Long Context Not comparable

Claude Sonnet 5.5: 45.9 (#28), Pixtral Large: —

BenchmarkClaude Sonnet 5.5Pixtral Large
LMArena Longer Query1498—

Writing & Preference Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#40), Pixtral Large: 32.9 (#278)

BenchmarkClaude Sonnet 5.5Pixtral Large
LMArena Text1471—
LMArena Creative Writing1465—
EQ-Bench Creative Writing—988
LMArena Multi-Turn1474—

Frequently asked questions

Is Claude Sonnet 5.5 better than Pixtral Large?

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 32.2 on the Noometry Index.

Which is cheaper, Claude Sonnet 5.5 or Pixtral Large?

Pixtral Large is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 128K.

How many benchmarks do Claude Sonnet 5.5 and Pixtral Large share?

1 benchmark has published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Pixtral Large has 3.

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