Noometry

Model comparison

Claude Opus 5.5 vs Gemini 4 Argon

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 56.5 on the Noometry Index.

Last verified . 21 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Gemini 4 Argon Google

56.5

Rank #24 Confirmed

Summary

  • They share 21 benchmarks with published results for both. Claude Opus 5.5 scores higher in 6 categories and Gemini 4 Argon in 4 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5.5 leads 80.2 to 44.2.
  • The biggest single-benchmark swing is APEX-Agents: 73.5% for Claude Opus 5.5 and 82.2% for Gemini 4 Argon.

Side by side

Claude Opus 5.5Gemini 4 Argon
ProviderAnthropicGoogle
Noometry Index68.656.5
Released2026-09-222026-09-30
WeightsProprietaryProprietary
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked4421

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), Gemini 4 Argon: 62.0 (#9)

BenchmarkClaude Opus 5.5Gemini 4 Argon
LMArena WebDev18131678
FrontierSWE62.3%55%
SciCode66.9%61.8%
LMArena Coding15471550
FrontierCode54.6%—
CursorBench57.8%—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Gemini 4 Argon leads

Claude Opus 5.5: 45.3 (#15), Gemini 4 Argon: 49.2 (#8)

BenchmarkClaude Opus 5.5Gemini 4 Argon
APEX-Agents73.5%82.2%
Vending-Bench 29,23513,718
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Gemini 4 Argon: 44.2 (#47)

BenchmarkClaude Opus 5.5Gemini 4 Argon
CritPt31.7%27.1%
LMArena Hard Prompts15351548
ARC-AGI-293.3%—
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—
Epoch Capabilities Index167.33—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), Gemini 4 Argon: 73.9 (#17)

BenchmarkClaude Opus 5.5Gemini 4 Argon
ProofBench100%99%
LMArena Math15061536
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), Gemini 4 Argon: 43.9 (#89)

BenchmarkClaude Opus 5.5Gemini 4 Argon
LMArena Expert15471553
GPQA Diamond90.6%—
SimpleQA Verified72.2%—

Multimodal Claude Opus 5.5 leads

Claude Opus 5.5: 57.8 (#1), Gemini 4 Argon: 46.5 (#14)

BenchmarkClaude Opus 5.5Gemini 4 Argon
Blueprint-Bench 251.2%54.4%
LMArena Vision1321—
Furniture Assembly83.3%—

Multilingual Gemini 4 Argon leads

Claude Opus 5.5: 59.1 (#2), Gemini 4 Argon: 60.3 (#1)

BenchmarkClaude Opus 5.5Gemini 4 Argon
LMArena Non-English15071523
LMArena Chinese15881610
LMArena Russian15201537
LMArena Spanish15071497
LMArena French1514—

Instruction Following Too close to call

Claude Opus 5.5: 80.0 (#3), Gemini 4 Argon: 80.1 (#2)

BenchmarkClaude Opus 5.5Gemini 4 Argon
LMArena Instruction Following15371538

Long Context Too close to call

Claude Opus 5.5: 47.1 (#19), Gemini 4 Argon: 47.6 (#15)

BenchmarkClaude Opus 5.5Gemini 4 Argon
LMArena Longer Query15321549

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), Gemini 4 Argon: 71.4 (#19)

BenchmarkClaude Opus 5.5Gemini 4 Argon
LMArena Text15151534
LMArena Creative Writing15331531
LMArena Multi-Turn14991557
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Gemini 4 Argon?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 56.5 on the Noometry Index.

Is Claude Opus 5.5 or Gemini 4 Argon better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 62.0 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Gemini 4 Argon share?

21 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Gemini 4 Argon has 21.

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