Claude Opus 4.5 vs Gemini 4 Argon
Claude Opus 4.5 
Gemini 4 Argon Verdict
- Gemini 4 Argon (high) leads on quality: 70.0 vs 60.0.
- Claude Opus 4.5 (thinking) is stronger in agents & tools, instruction following, multimodal.
- Gemini 4 Argon (high) is stronger in coding, composite, knowledge, long context, maths, reasoning, human preference.
- Gemini 4 Argon (high) is 2.5× cheaper ($4.00 vs $10.00 per 1M blended).
| Metric | Claude Opus 4.5 (thinking) | Gemini 4 Argon (high) |
|---|---|---|
| BenchLeader Index | 60.0 | 70.0 |
| Agents & tools score | 74.5 | 67.5 |
| Coding score | 60.6 | 72.1 |
| Composite score | 62.5 | 89.2 |
| Instruction following score | 54.1 | – |
| Knowledge score | 60.2 | 75.7 |
| Long context score | 63.8 | 65.0 |
| Maths score | 64.0 | 71.9 |
| Multimodal score | 57.3 | – |
| Reasoning score | 54.5 | 82.0 |
| Human preference score | – | 73.2 |
| Blended price $/M | $10.00 | $4.00 |
| Output speed | 48 tok/s | – |
| Time to first answer | 14.1 s | – |
| Context window | 200k | 1M |
| SciCode | – | 61.8% |
| LMArena Text | – | 1525 |
| LMArena Hard Prompts | – | 1551 |
| LMArena Coding | – | 1562 |
| LMArena WebDev | – | 1678 |
| LMArena Agent | – | 9.3 |
| AA Intelligence Index v4.3.2 | 29.1 | 52.6 |
| IFBench | 58.0% | – |
| AA-LCR | 77.3% | 79.7% |
| MMMU-Pro | 74.0% | – |
| AA-Omniscience | 14 | 42.4 |
| Terminal-Bench Hard | 47.0% | – |
| GPQA Diamond (AA) | 86.6% | – |
| Humanity's Last Exam (AA) | 30.1% | 57.1% |
| SciCode (AA) | – | 61.8% |
| τ²-Bench Telecom (AA) | 89.5% | – |
| AIME (Vals) | 95.4% | – |
| LiveCodeBench | 83.7% | – |
| MMLU-Pro | 87.3% | – |
| IOI | – | 100.0% |
| LegalBench | 84.6% | 88.3% |
| CorpFin | 65.1% | – |
| TaxEval | 74.9% | – |
| MedQA | 95.9% | – |
| MGSM | 95.2% | – |
| SWE-bench (Vals) | 76.4% | – |
| GPQA Diamond (Vals) | 85.9% | – |
| Vals Index | – | 68.9 |
| MultiChallenge | 59.0% | – |
| PRBench Finance | 46.2% | – |
| PRBench Legal | 44.2% | – |
| VISTA | 46.4% | – |
| MultiNRC | 48.6% | – |
| TutorBench | 51.2% | – |
| Kagi LLM Benchmark | 80.2% | – |
| ARC-AGI-1 | 80.0% | – |
| ARC-AGI-2 | 37.6% | – |
| CritPt | 4.6% | 27.1% |
| GDPval-AA v2.1 | – | 56.3% |
| BioMysteryBench | – | 76.3% |
| CaseLaw v2 | 62.6% | – |
| Code Migration | – | 68.2% |
| CUA-bench | – | 4.8% |
| CyberBench | – | 77.9% |
| Excel Modeling Benchmark | – | 75.2% |
| Finance Agent v2 | – | 65.4% |
| Harvey's Legal Agent Benchmark | – | 19.6% |
| Legal Research Bench | – | 54.8% |
| MedCode | 49.2% | 58.8% |
| MedScribe | 85.3% | 87.4% |
| MMMU-Pro (Vals) | 83.0% | – |
| MortgageTax | 67.7% | – |
| MysteryMechanism | – | 45.5% |
| ProgramBench | – | 2.5% |
| Public Benefits Bench | – | 69.8% |
| SAGE | 52.1% | 53.6% |
| SREBench | – | 44.3% |
| Tax Agent Bench | – | 76.2% |
| Terminal-Bench 2.0 (Vals) | 53.9% | – |
| Terminal-Bench 4.0 (Vals) | – | 57.6% |
| Terminal-Bench Science | – | 44.3% |
| Vibe Code Bench v1.1 | 20.6% | 91.9% |
| FORTRESS | 9.6% | – |
| MASK | 92.5% | – |
| LMArena Maths | – | 1528 |
| LMArena Creative Writing | – | 1519 |
| LMArena Instruction Following | – | 1529 |
| LMArena Multi-turn | – | 1553 |
| LMArena Longer Queries | – | 1545 |
| FrontierSWE | – | 55.0% |
| Terminal-Bench 4.0 (AA) | – | 57.1% |
| AutomationBench | – | 77.5% |
| GDP.pdf | – | 21.8% |
| AA-Omniscience: accuracy | 46.6% | 49.9% |
| AA-Omniscience: non-hallucination | 39.0% | 84.9% |
| AA-Briefcase v1.1 | – | 1488 |
| DeepSearchQA | 24.0% | – |
Data as of 2026-10-11. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 4.5 vs Gemini 4 Argon: questions
- Is Claude Opus 4.5 better than Gemini 4 Argon?
- Gemini 4 Argon (high) leads on quality: 70.0 vs 60.0. The BenchLeader Index combines every independent quality benchmark; Gemini 4 Argon (high) is ahead overall as of 2026-10-11, but check the category scores for your use.
- Is Claude Opus 4.5 better than Gemini 4 Argon for coding?
- Gemini 4 Argon scores higher in coding (72 vs 61 on the category index, where 50 is average).
- Is Claude Opus 4.5 better than Gemini 4 Argon for agentic tasks?
- Claude Opus 4.5 scores higher in agentic tasks (75 vs 68 on the category index, where 50 is average).
- Which is cheaper, Claude Opus 4.5 or Gemini 4 Argon?
- Gemini 4 Argon is cheaper: $4.00 against $10.00 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Gemini 4 Argon accepts more context: 1M against 200k tokens.