Compare · ModelsLive · 2 picked · head to head
Claude Opus 5.5 vs Gemini 3 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5.5 wins on 6/8 benchmarks
Claude Opus 5.5 wins 6 of 8 shared benchmarks. Leads in speed · agentic · reasoning.
Category leads
speed·Claude Opus 5.5agentic·Claude Opus 5.5reasoning·Claude Opus 5.5knowledge·Gemini 3 Promath·Claude Opus 5.5general·Claude Opus 5.5
Hype vs Reality
Attention vs performance
Claude Opus 5.5
#3 by perf·#9 by attention
Gemini 3 Pro
#71 by perf·#5 by attention
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Google DeepMind
$4.20T·Tier 1
Head to head
8 benchmarks · 2 models
Claude Opus 5.5Gemini 3 Pro
Artificial Analysis · Quality Index
Claude Opus 5.5 leads by +16.3
Claude Opus 5.5
57.6
Gemini 3 Pro
41.3
APEX-Agents
Claude Opus 5.5 leads by +55.1
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Opus 5.5
73.5
Gemini 3 Pro
18.4
ARC-AGI
Claude Opus 5.5 leads by +22.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Claude Opus 5.5
97.5
Gemini 3 Pro
75.0
ARC-AGI-2
Claude Opus 5.5 leads by +61.4
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Claude Opus 5.5
92.5
Gemini 3 Pro
31.1
GPQA diamond
Gemini 3 Pro leads by +2.7
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Opus 5.5
87.5
Gemini 3 Pro
90.2
OTIS Mock AIME 2024-2025
Claude Opus 5.5 leads by +8.6
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Opus 5.5
100.0
Gemini 3 Pro
91.4
Proofbench
Claude Opus 5.5 leads by +80.0
Claude Opus 5.5
100.0
Gemini 3 Pro
20.0
SimpleQA Verified
Gemini 3 Pro leads by +0.7
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Opus 5.5
72.2
Gemini 3 Pro
72.9
Full benchmark table
| Benchmark | Claude Opus 5.5 | Gemini 3 Pro |
|---|---|---|
Artificial Analysis · Quality Index | 57.6 | 41.3 |
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 73.5 | 18.4 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 97.5 | 75.0 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 92.5 | 31.1 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 87.5 | 90.2 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 100.0 | 91.4 |
Proofbench | 100.0 | 20.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 72.2 | 72.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $4.00 | $20.00 | 1.0M tokens (~500 books) | $80.00 | |
| — | — | — | — |
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