GPT-6 Astra vs. Fable 5.1 benchmarks: which scores are comparable and which aren't
On September 3, 2026, OpenAI released GPT-6 Astra and Astra Pro, initially limited to enterprises in the Daybreak cybersecurity program, with paid ChatGPT, the API, and AWS opening up over the following days.
Why it matters: We break down the benchmark comparison between GPT-6 Astra and Fable 5.1, pointing out that the tested versions and harnesses differ across teams, so readers can judge which scores are actually comparable.