Claude Opus 4.5 vs Gemini 3 Pro
Claude Opus 4.5 
Gemini 3 Pro Verdict
- Gemini 3 Pro leads on quality: 61.7 vs 60.7.
- Claude Opus 4.5 (thinking) is stronger in agents & tools, composite, knowledge, long context, maths.
- Gemini 3 Pro is stronger in coding, instruction following, multimodal, reasoning, human preference.
- Gemini 3 Pro is 2.2× cheaper ($4.50 vs $10.00 per 1M blended).
| Metric | Claude Opus 4.5 (thinking) | Gemini 3 Pro |
|---|---|---|
| BenchLeader Index | 60.7 | 61.7 |
| Agents & tools score | 74.6 | 62.3 |
| Coding score | 56.4 | 58.9 |
| Composite score | 65.8 | 64.3 |
| Instruction following score | 54.8 | 64.3 |
| Knowledge score | 61.0 | 60.9 |
| Long context score | 65.2 | 64.5 |
| Maths score | 64.0 | 48.4 |
| Multimodal score | 58.0 | 65.7 |
| Reasoning score | 58.6 | 67.1 |
| Human preference score | – | 69.0 |
| Blended price $/M | $10.00 | $4.50 |
| Output speed | 45 tok/s | – |
| Time to first answer | 17.3 s | – |
| Context window | 200k | 1M |
| GPQA Diamond | – | 92.6% |
| OTIS Mock AIME | – | 91.4% |
| SWE-bench Verified (Epoch) | – | 72.9% |
| Humanity's Last Exam | – | 37.5% |
| Terminal-Bench | – | 69.4% |
| SimpleBench | – | 76.4% |
| GDPval | – | 40.3% |
| Remote Labor Index | – | 1.3% |
| WeirdML | – | 69.9% |
| APEX-Agents | – | 31.5% |
| ProofBench | – | 20.0% |
| GSO-Bench | – | 18.6% |
| Epoch Capabilities Index | – | 153.0 |
| LMArena Text | – | 1486 |
| LMArena Hard Prompts | – | 1504 |
| LMArena Coding | – | 1518 |
| LMArena WebDev | – | 1439 |
| LMArena Vision | – | 1305 |
| AA Intelligence Index | 29.1 | 28.0 |
| IFBench | 58.0% | 70.4% |
| AA-LCR | 77.3% | 76.0% |
| MMMU-Pro | 74.0% | 80.2% |
| AA-Omniscience | 14 | 15.3 |
| Terminal-Bench Hard | 47.0% | 41.7% |
| GPQA Diamond (AA) | 86.6% | 90.8% |
| Humanity's Last Exam (AA) | 30.1% | 39.7% |
| τ²-Bench Telecom (AA) | 89.5% | 87.1% |
| AIME (Vals) | 95.4% | – |
| LiveCodeBench | 83.7% | 86.4% |
| MMLU-Pro | 87.3% | 90.1% |
| IOI | 20.3% | – |
| LegalBench | 84.6% | – |
| CorpFin | 65.1% | – |
| TaxEval | 74.9% | – |
| MedQA | 95.9% | – |
| MGSM | 95.2% | – |
| SWE-bench (Vals) | 76.4% | – |
| GPQA Diamond (Vals) | 85.9% | – |
| AIME 2026 | – | 91.7% |
| HMMT February 2026 | – | 86.4% |
| MathArena Apex | – | 23.4% |
| SWE-Bench Pro | – | 43.3% |
| MCP Atlas | – | 70.3% |
| MultiChallenge | 59.0% | 65.7% |
| PRBench Finance | 46.2% | 39.2% |
| PRBench Legal | 44.2% | 40.6% |
| VISTA | 46.4% | 51.5% |
| MultiNRC | 48.6% | 59.0% |
| TutorBench | 51.2% | 53.7% |
| MMMU-Pro (official) | – | 81.0% |
| Kagi LLM Benchmark | 80.2% | 80.1% |
| SWE-bench Verified (bash only) | – | 74.2% |
| SWE-bench Verified (any scaffold) | – | 77.4% |
| ARC-AGI-1 | 80.0% | 75.0% |
| ARC-AGI-2 | 37.6% | 54.0% |
| BFCL Overall | – | 72.5% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 4.5 vs Gemini 3 Pro: questions
- Is Claude Opus 4.5 better than Gemini 3 Pro?
- Gemini 3 Pro leads on quality: 61.7 vs 60.7. The BenchLeader Index combines every independent quality benchmark; Gemini 3 Pro is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is Claude Opus 4.5 better than Gemini 3 Pro for coding?
- Gemini 3 Pro scores higher in coding (59 vs 56 on the category index, where 50 is average).
- Is Claude Opus 4.5 better than Gemini 3 Pro for agentic tasks?
- Claude Opus 4.5 scores higher in agentic tasks (75 vs 62 on the category index, where 50 is average).
- Which is cheaper, Claude Opus 4.5 or Gemini 3 Pro?
- Gemini 3 Pro is cheaper: $4.50 against $10.00 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Gemini 3 Pro accepts more context: 1M against 200k tokens.