Noometry

Model comparison

Claude Opus 5.5 vs Granite 3.1 2b Instruct

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 32.6 on the Noometry Index.

Last verified . 11 shared benchmarks.

Claude Opus 5.5 Anthropic

68.5

Rank #3 Confirmed

Granite 3.1 2b Instruct IBM

32.6

Rank #243 Confirmed

Summary

  • They share 11 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Granite 3.1 2b Instruct in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 30.6.
  • Granite 3.1 2b Instruct has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Granite 3.1 2b Instruct
ProviderAnthropicIBM
Noometry Index68.532.6
Released2026-09-22—
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked3512

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.4 (#1), Granite 3.1 2b Instruct: 32.9 (#255)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Coding15451149
FrontierCode54.4%—
CursorBench57.8%—
LMArena WebDev1820—
FrontierSWE62.3%—
SciCode66.9%—
MirrorCode77.4%—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#13), Granite 3.1 2b Instruct: —

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
APEX-Agents73.5%—
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 79.5 (#2), Granite 3.1 2b Instruct: 21.0 (#206)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Hard Prompts15451138
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), Granite 3.1 2b Instruct: 30.6 (#206)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math—1159

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.6 (#9), Granite 3.1 2b Instruct: 30.3 (#223)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Expert15641131
GPQA Diamond90.6%—
SimpleQA Verified72.2%—

Multimodal Not comparable

Claude Opus 5.5: 56.5 (#2), Granite 3.1 2b Instruct: —

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.8 (#1), Granite 3.1 2b Instruct: 29.2 (#264)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Non-English15131068
LMArena Chinese15721138
LMArena Russian15321063

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.1 (#2), Granite 3.1 2b Instruct: 58.0 (#259)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Instruction Following15351116

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.3 (#18), Granite 3.1 2b Instruct: 35.0 (#239)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Longer Query15401155

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.7 (#3), Granite 3.1 2b Instruct: 34.3 (#269)

BenchmarkClaude Opus 5.5Granite 3.1 2b Instruct
LMArena Text15181127
LMArena Creative Writing15381116
LMArena Multi-Turn15201099
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Granite 3.1 2b Instruct?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 32.6 on the Noometry Index.

Is Claude Opus 5.5 or Granite 3.1 2b Instruct better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 32.9 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Granite 3.1 2b Instruct share?

11 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Granite 3.1 2b Instruct has 12.

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