GPT-6 Astra is OpenAI's flagship model and the one OpenAI recommends starting with for complex reasoning and coding. It takes text and image input, supports reasoning effort from low to max, and works with OpenAI's built-in tools: functions, web search, file search and computer use. In ChatGPT it powers Pro reasoning.
GPT-6 Astra
OpenAI's most capable model, for complex reasoning and coding
Checked 2026-11-12 against OpenAI's documentation
| Provider | OpenAI |
| Status | Current |
| Context window | 1.05M tokens |
| Pricing | Paid |
| Input price | $10.00/M |
| Output price | $50.00/M |
| Capabilities | textvisioncodefunction-callingreasoning |
| API docs | Docs ↗ |
Benchmarks
Benchmark data not yet available for this model.
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Compare with similar models
| GPT-6 Astra | Claude Opus 4.6 | Gemini 2.5 Pro | Claude Fable 5.2 | |
|---|---|---|---|---|
| Context | 1.05M | 200K | 1.05M | 1M |
| MMLU | — | 92.0 | 91.0 | — |
| HumanEval | — | 94.5 | — | — |
| MATH | — | 97.1 | 97.0 | — |
| GPQA | — | 79.9 | 84.0 | — |
| Pricing | Paid | Paid | Paid | Paid |
| Input $/M | $10.00 | $15.00 | $1.25 | $8.00 |