Claude Opus 4.5 vs GPT-6 Astra
Head to head on 11 shared benchmarks, with price, context window, and release dates.
Benchmark scores
66evals · sort by any column, ⤢ to expand fullscreen
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| GPT-6 Astra OpenAI | 2164elo | 82.8 | 97.6% | 96.1% | 54.7% | 48.5% | 87.9% | 99.0% | 46.4% | 56.5% | 89.6% | 59.3% | - | 95.0% | 98.5% | 99.9% | 41.4% | 95.9% | 91.5% | - | - | 92.0% | - | - | 74.1% | 100.0% | 42.4% | 53.5% | 53.3% | 37.8% | - | - | 63.4% | - | - | - | 60.3% | - | - | - | - | - | - | - | - | - | - | - | - | 96.3% | 0.84 | 72.6% | - | 92.7% | 85.4% | - | 88.0% | - | - | - | - | 57.9% | - | 64.6% | 66.6% | - | 74.5% |
| Claude Opus 4.5 Anthropic | 1683elo | 73.1 | 20.7% | 86.6% | 30.1% | 45.2% | 83.2% | 36.0% | 45.0% | 49.5% | 20.6% | - | 91.3% | - | - | - | - | - | - | 16.7% | 61.3% | - | 35.6% | 6.1% | - | - | - | - | - | - | 84.7% | 12.13 | - | 83.8% | 58.0% | 83.5% | - | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 87.1% | 89.5% | 68.7% | 100.0% | 37.4 | - | - | - | 77.5% | - | - | 45.3 | - | 70.7% | 79.2% | 74.3% | 61.8 | - | 47.0% | - | - | 89.5% | 64.8% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | GPT-6 Astra OpenAI |
|---|---|---|
| Description | Claude Opus 4.5 is an AI model from Anthropic. | OpenAI's GPT-6 flagship, launched as its best computer-use model: it drives browsers, spreadsheets and desktop applications rather than answering questions about them. Built on OpenAI's largest training run to date and the first model it designates Critical for cybersecurity capability. Rolling out from Daybreak enterprise access to ChatGPT and the API; Pro, Business and Enterprise plans also get a GPT-6 Astra Pro tier. |
| Family | Claude | GPT |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | - |
| Released | 24 Nov 2025 | 3 Sep 2026 |
| Context | 200,000 | 1,050,000 |
| Input $/1M | $5.00 | $10.00 |
| Output $/1M | $25.00 | $50.00 |
| Cache read $/1M | $0.500 | $1.000 |
| Cache write $/1M | $6.250 | $12.500 |
| Speed | 0 tok/s | 63 tok/s |
| Latency | 0.00 s | 198.54 s |
| Modalities | file, image, text | file, image, text |
| Providers | - | openai |
| Publisher | Anthropic | OpenAI |
| Reported scores |
FAQ
- Is Claude Opus 4.5 or GPT-6 Astra better?
- Across the 11 benchmarks both models report on Sophon, GPT-6 Astra leads on 11 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.5 and GPT-6 Astra compare on GPQA Diamond?
- Claude Opus 4.5 scores 86.6% and GPT-6 Astra scores 96.1% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or GPT-6 Astra?
- Claude Opus 4.5 is cheaper at $25.00 per million output tokens against $50.00 for GPT-6 Astra - about 2.0x.
- When were Claude Opus 4.5 and GPT-6 Astra released?
- Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. GPT-6 Astra was released 3 Sep 2026 by OpenAI.
Other head-to-heads
56Claude Opus 4.5 vs GPT-5.235 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Opus 4.5 vs GPT-5 Mini31 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude Opus 4.5 vs Gemini 3.1 Pro Preview28 shared evalsClaude Opus 4.5 vs Claude Opus 4.628 shared evalsClaude Opus 4.5 vs GPT-5.428 shared evalsClaude Opus 4.5 vs DeepSeek V3.227 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.5 vs Claude Opus 4.724 shared evalsClaude Opus 4.5 vs Gemini 2.5 Pro24 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.623 shared evalsClaude Opus 4.5 vs GLM 5.123 shared evalsClaude Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsGPT-5.5 vs GPT-6 Astra19 shared evalsClaude Opus 4.8 vs GPT-6 Astra19 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude Fable 5 vs GPT-6 Astra18 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsGemini 3.1 Pro Preview vs GPT-6 Astra16 shared evalsClaude Opus 4.5 vs GPT-4.116 shared evalsClaude Opus 4.5 vs GPT-4o-mini15 shared evalsClaude Opus 4.5 vs GPT-4.1 Nano15 shared evalsClaude Opus 4.7 vs GPT-6 Astra14 shared evalsGLM 5.1 vs GPT-6 Astra14 shared evalsGPT-5.2 vs GPT-6 Astra13 shared evalsClaude Opus 4.6 vs GPT-6 Astra13 shared evalsGPT-5.4 vs GPT-6 Astra13 shared evalsGPT-6 Astra vs Kimi K2.513 shared evalsClaude Sonnet 4.6 vs GPT-6 Astra13 shared evalsGPT-5 Mini vs GPT-6 Astra12 shared evalsGPT-5 vs GPT-6 Astra12 shared evalsGPT-5.4 Mini vs GPT-6 Astra12 shared evalsClaude Sonnet 4.5 vs GPT-6 Astra11 shared evalsGPT-6 Astra vs Qwen3.6 Plus11 shared evalsGPT-5 Nano vs GPT-6 Astra10 shared evalsGemini 2.5 Pro vs GPT-6 Astra10 shared evalsGPT-6 Astra vs Grok 4.1 Fast10 shared evalsDeepSeek V3.2 vs GPT-6 Astra9 shared evalsGLM 4.7 vs GPT-6 Astra9 shared evalsClaude 4 Sonnet vs GPT-6 Astra8 shared evalsGPT-4.1 Mini vs GPT-6 Astra6 shared evalsGPT-4.1 Nano vs GPT-6 Astra6 shared evalsGPT-6 Astra vs gpt-oss-120b6 shared evalsGPT-4.1 vs GPT-6 Astra5 shared evalsGPT-4o-mini vs GPT-6 Astra4 shared evalsGPT-4o vs GPT-6 Astra4 shared evals
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