Fable 5.1 scores ~2 points above GPT-6 Astra but costs 2.4x per benchmark task

ForwardLoop · reddit · 2026-09-05

A Reddit user compared the top-tier models via Artificial Analysis' Intelligence Index: Claude Fable 5.1 (max with fb) scores roughly two points above GPT-6 Astra (max), but costs about 2.4x as much per benchmark task.

The poster was impressed with Fable 5.1 and plans to test Astra over the coming days, inviting users of both to weigh in on where the gap actually shows up and whether the premium is worth it.

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