Noometry

Model comparison

Claude Opus 5.5 vs Gemini 3 Deep Think

Claude Opus 5.5 has enough public results to be ranked (#3); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

Last verified . 3 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Gemini 3 Deep Think Google

58.3

Unranked Sparse

Summary

  • They share 3 benchmarks with published results for both. Claude Opus 5.5 scores higher in 1 category and Gemini 3 Deep Think in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5.5 leads 80.2 to 70.2.
  • The biggest single-benchmark swing is ARC-AGI-2: 93.3% for Claude Opus 5.5 and 84.6% for Gemini 3 Deep Think.

Side by side

Claude Opus 5.5Gemini 3 Deep Think
ProviderAnthropicGoogle
Noometry Index68.658.3
Released2026-09-222026-02-12
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 Not comparable

Claude Opus 5.5: 71.9 (#3), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
LMArena Coding1547—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Gemini 3 Deep Think: 70.2 (#14)

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
ARC-AGI-293.3%84.6%
ARC-AGI-198.5%96%
CritPt31.7%25.7%
NYT Connections (extended)88.5%—
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), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
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), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.1 (#2), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
LMArena Non-English1507—
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Not comparable

Claude Opus 5.5: 80.0 (#3), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
LMArena Instruction Following1537—

Long Context Not comparable

Claude Opus 5.5: 47.1 (#19), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
LMArena Longer Query1532—

Writing & Preference Not comparable

Claude Opus 5.5: 78.2 (#3), Gemini 3 Deep Think: —

BenchmarkClaude Opus 5.5Gemini 3 Deep Think
LMArena Text1515—
LMArena Creative Writing1533—
EQ-Bench Creative Writing2050—
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5.5 better than Gemini 3 Deep Think?

Claude Opus 5.5 has enough public results to be ranked (#3); Gemini 3 Deep Think does not yet, so treat this comparison as directional.

How many benchmarks do Claude Opus 5.5 and Gemini 3 Deep Think share?

3 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Gemini 3 Deep Think has 3.

Related comparisons

Go deeper