Noometry

Model comparison

Claude Opus 5.5 vs Nova 2.0 Pro Preview

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 33.4 on the Noometry Index.

Last verified . 3 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Nova 2.0 Pro Preview Amazon

33.4

Rank #244 Reported

Summary

  • They share 3 benchmarks with published results for both. Claude Opus 5.5 scores higher in 3 categories and Nova 2.0 Pro Preview in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5.5 leads 80.2 to 22.4.
  • The biggest single-benchmark swing is CritPt: 31.7% for Claude Opus 5.5 and 0% for Nova 2.0 Pro Preview.

Side by side

Claude Opus 5.5Nova 2.0 Pro Preview
ProviderAnthropicAmazon
Noometry Index68.633.4
Released2026-09-222025-12-02
WeightsProprietaryProprietary
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked443

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), Nova 2.0 Pro Preview: 40.8 (#133)

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
SciCode66.9%42.7%
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
LMArena Coding1547—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Claude Opus 5.5 leads

Claude Opus 5.5: 45.3 (#15), Nova 2.0 Pro Preview: 21.9 (#136)

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
GDP.pdf30.6%2%
APEX-Agents73.5%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Nova 2.0 Pro Preview: 22.4 (#194)

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
CritPt31.7%0%
ARC-AGI-293.3%—
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
EBR-Bench71.4%—
LMArena Hard Prompts1535—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—
Epoch Capabilities Index167.33—

Math Not comparable

Claude Opus 5.5: 91.8 (#3), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math1506—
FrontierMath Erdős2.9%—

Knowledge Not comparable

Claude Opus 5.5: 66.4 (#10), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.1 (#2), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
LMArena Non-English1507—
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Not comparable

Claude Opus 5.5: 80.0 (#3), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
LMArena Instruction Following1537—

Long Context Not comparable

Claude Opus 5.5: 47.1 (#19), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
LMArena Longer Query1532—

Writing & Preference Not comparable

Claude Opus 5.5: 78.2 (#3), Nova 2.0 Pro Preview: —

BenchmarkClaude Opus 5.5Nova 2.0 Pro Preview
LMArena Text1515—
LMArena Creative Writing1533—
EQ-Bench Creative Writing2050—
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5.5 better than Nova 2.0 Pro Preview?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 33.4 on the Noometry Index.

Is Claude Opus 5.5 or Nova 2.0 Pro Preview better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 40.8 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Nova 2.0 Pro Preview share?

3 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Nova 2.0 Pro Preview has 3.

Related comparisons

Go deeper