Claude Opus 4.8 vs GPT-6 Astra
Head to head on 19 shared benchmarks, with price, context window, and release dates.
Benchmark scores
59evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-6 Astra OpenAI | 41.4% | 92.0% | 2164elo | 82.8 | 100.0% | 53.5% | 53.3% | 97.6% | 96.1% | 63.4% | 54.7% | 48.5% | 87.9% | 99.0% | 46.4% | 56.5% | 57.9% | 66.6% | 89.6% | 59.3% | 95.0% | 98.5% | 99.9% | 95.9% | - | - | 91.5% | - | 74.1% | - | 42.4% | - | - | 37.8% | - | - | 60.3% | - | - | - | - | - | - | - | - | - | 96.3% | 0.84 | 72.6% | - | 92.7% | 85.4% | 88.0% | - | - | - | 64.6% | - | - | 74.5% |
| Claude Opus 4.8 Anthropic | 15.5% | 64.0% | 1835elo | 80.8 | 40.0% | 53.9% | 13.4% | 47.2% | 92.0% | 56.9% | 48.7% | 53.2% | 85.8% | 69.0% | 54.8% | 53.5% | 82.7% | 60.9% | 82.7% | - | - | - | - | - | 80.4% | 14.5% | - | 66.7% | - | 1281elo | - | 22.5% | 1890elo | - | 62.2% | 10.4% | - | 80.1% | 79.3% | 78.3% | 67.4% | 81.4% | 84.3% | 89.7% | 91.8% | 69.9% | - | - | - | 83.4% | - | - | - | 69.2% | 75.6% | 58.3% | - | 70.9% | 94.4% | 63.3% |
2 / 2 models
| Attribute | Claude Opus 4.8 Anthropic | GPT-6 Astra OpenAI |
|---|---|---|
| Description | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) 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 |
| License | - | - |
| Released | 28 May 2026 | 3 Sep 2026 |
| Context | 1,000,000 | 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 | text, image, file | file, image, text |
| Providers | - | openai |
| Publisher | Anthropic | OpenAI |
| Reported scores |
FAQ
- Is Claude Opus 4.8 or GPT-6 Astra better?
- Across the 19 benchmarks both models report on Sophon, GPT-6 Astra leads on 15 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.8 and GPT-6 Astra compare on GPQA Diamond?
- Claude Opus 4.8 scores 92.0% and GPT-6 Astra scores 96.1% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.8 or GPT-6 Astra?
- Claude Opus 4.8 is cheaper at $25.00 per million output tokens against $50.00 for GPT-6 Astra - about 2.0x.
- When were Claude Opus 4.8 and GPT-6 Astra released?
- Claude Opus 4.8 was released 28 May 2026 by Anthropic. GPT-6 Astra was released 3 Sep 2026 by OpenAI.
Other head-to-heads
56Claude Opus 4.8 vs GPT-5.541 shared evalsClaude Fable 5 vs Claude Opus 4.840 shared evalsClaude Opus 4.8 vs Gemini 3.1 Pro Preview38 shared evalsClaude Opus 4.7 vs Claude Opus 4.830 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.6 vs Claude Opus 4.828 shared evalsClaude Opus 4.8 vs GPT-5.428 shared evalsClaude Opus 4.8 vs Kimi K2.528 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Opus 4.8 vs GPT-5.226 shared evalsClaude Opus 4.8 vs GPT-5.4 Mini26 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Opus 4.8 vs Qwen3.6 Plus25 shared evalsClaude Opus 4.8 vs GPT-5 Mini24 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsClaude 4 Sonnet vs Claude Opus 4.822 shared evalsClaude Opus 4.8 vs DeepSeek V3.222 shared evalsClaude Opus 4.8 vs GLM 4.721 shared evalsClaude Opus 4.8 vs Gemini 2.5 Pro20 shared evalsGPT-5.5 vs GPT-6 Astra19 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Fable 5 vs GPT-6 Astra18 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsGemini 3.1 Pro Preview vs GPT-6 Astra16 shared evalsClaude Opus 4.8 vs GPT-4o14 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 evalsClaude Opus 4.8 vs GPT-4o-mini12 shared evalsClaude Opus 4.8 vs GPT-4.1 Nano12 shared evalsGPT-5.4 Mini vs GPT-6 Astra12 shared evalsClaude Opus 4.8 vs GPT-4.1 Mini11 shared evalsClaude Sonnet 4.5 vs GPT-6 Astra11 shared evalsClaude Opus 4.8 vs GPT-4.111 shared evalsClaude Opus 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
Comparing something else? Build your own side-by-side.