AI models / Compare
GPT-6 Astra vs Claude Fable 5.1
GPT-6 Astra: OpenAI's top-priced GPT-6 model on the API price list. Claude Fable 5.1: Anthropic's model for demanding reasoning and long-horizon agentic work.
| Spec | GPT-6 Astra | Claude Fable 5.1 |
|---|---|---|
| Provider | OpenAI | Anthropic |
| API model ID | gpt-6-astra | claude-fable-5-1 |
| API price (standard) | $10.00 in / $50.00 out per 1M tokens | $10.00 in / $50.00 out per 1M tokens |
| Pricing note | Short-context pricing up to 272K input tokens; higher long-context rates above that. | Batch API is 50% off. |
| Context window | Not stated | 1M tokens |
| Max output | Not stated | 128K tokens |
| Weights | Closed (API only) | Closed (API only) |
Figures from each provider's official docs, checked 2026-10-15. Benchmarks and real-world quality vary by task, so test both on your own prompts.