6 September 2026
OpenAI releases GPT-6 Astra, Anthropic cuts Claude cache costs 75%
First reported
Deep Learning Weekly, Sloth Bytes and 1 other ran this on , a day before the next source picked it up.
- OpenAI released GPT-6 Astra, optimized for automating computer tasks and testing. Artificial Analysis benchmark rankings show it second after Anthropic's Claude Fable 5.1.
- Anthropic released Claude Fable 5.1 and Mythos 5.1 with cache read costs reduced to $0.25 per million tokens, down 75% from prior pricing.
Where they differ
Reported by The Decoder