Noometry

Model comparison

Claude Opus 5.5 vs Olmo 7b Instruct

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 29.7 on the Noometry Index.

Last verified . 9 shared benchmarks.

Claude Opus 5.5 Anthropic

68.5

Rank #3 Confirmed

Olmo 7b Instruct Allen Institute for AI (Ai2)

29.7

Rank #293 Confirmed

Summary

  • They share 9 benchmarks with published results for both. Claude Opus 5.5 scores higher in 6 categories and Olmo 7b Instruct in 0 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 27.8.
  • Olmo 7b Instruct has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Olmo 7b Instruct
ProviderAnthropicAllen Institute for AI (Ai2)
Noometry Index68.529.7
Released2026-09-22—
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked3510

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.4 (#1), Olmo 7b Instruct: 29.1 (#298)

BenchmarkClaude Opus 5.5Olmo 7b Instruct
LMArena Coding15451016
FrontierCode54.4%—
CursorBench57.8%—
LMArena WebDev1820—
FrontierSWE62.3%—
SciCode66.9%—
MirrorCode77.4%—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#13), Olmo 7b Instruct: —

BenchmarkClaude Opus 5.5Olmo 7b Instruct
APEX-Agents73.5%—
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 79.5 (#2), Olmo 7b Instruct: 18.0 (#273)

BenchmarkClaude Opus 5.5Olmo 7b Instruct
LMArena Hard Prompts1545993
ARC-AGI-292.5%—
NYT Connections (extended)88.5%—
ARC-AGI-197.5%—
CritPt31.7%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 92.4 (#2), Olmo 7b Instruct: 27.8 (#234)

BenchmarkClaude Opus 5.5Olmo 7b Instruct
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math—1018

Knowledge Not comparable

Claude Opus 5.5: 66.6 (#9), Olmo 7b Instruct: —

BenchmarkClaude Opus 5.5Olmo 7b Instruct
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
LMArena Expert1564—

Multimodal Not comparable

Claude Opus 5.5: 56.5 (#2), Olmo 7b Instruct: —

BenchmarkClaude Opus 5.5Olmo 7b Instruct
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.8 (#1), Olmo 7b Instruct: 24.1 (#286)

BenchmarkClaude Opus 5.5Olmo 7b Instruct
LMArena Non-English1513977
LMArena Chinese15721013
LMArena Russian1532946

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.1 (#2), Olmo 7b Instruct: 49.3 (#296)

BenchmarkClaude Opus 5.5Olmo 7b Instruct
LMArena Instruction Following1535978

Long Context Not comparable

Claude Opus 5.5: 47.3 (#18), Olmo 7b Instruct: —

BenchmarkClaude Opus 5.5Olmo 7b Instruct
LMArena Longer Query1540—

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.7 (#3), Olmo 7b Instruct: 26.0 (#298)

BenchmarkClaude Opus 5.5Olmo 7b Instruct
LMArena Text15181032
LMArena Creative Writing1538990
LMArena Multi-Turn15201007
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Olmo 7b Instruct?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 29.7 on the Noometry Index.

Is Claude Opus 5.5 or Olmo 7b Instruct better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 29.1 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Olmo 7b Instruct share?

9 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Olmo 7b Instruct has 10.

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