GPT‑6 Astra
Astra is positioned as OpenAI’s Claude Fable rival, with matching API pricing and strong self-reported benchmark results.
Willison notes it will cost $10 per million input tokens and $50 per million output tokens. He highlights a 99.9% ARC-AGI 3 result, while also noting the default harness scored 62.7% and Fable 5 has no published result there. Astra posts especially high security-task scores and stronger long-context results, but Artificial Analysis still ranks it below Claude Fable 5.1 on its Intelligence Index. The API label will be `gpt-6-astra`. Simon Willison's note
Willison notes it will cost $10 per million input tokens and $50 per million output tokens. He highlights a 99.9% ARC-AGI 3 result, while also noting the default harness scored 62.7% and Fable 5 has no published result there. Astra posts especially high security-task scores and stronger long-context results, but Artificial Analysis still ranks it below Claude Fable 5.1 on its Intelligence Index. The API label will be `gpt-6-astra`. Simon Willison's note
score 9