AnalysisAI ModelsSeptember 6, 2026

GPT-6 Astra beats Claude Fable 5.1 on robot arm block task

On the same YAM arms and Inspect Robots policy, GPT-6 Astra placed the block in the bowl in 19 of 20 trials versus Fable 5.1's 8 of 20 and Fable 5's 1 of 20, at 2.5 minutes and ~$0.94 per run versus 6.8 minutes and $2.12. On the puzzle-insertion task Astra managed 2 of 20, matching Fable 5.1's 2 of 20.

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GPT-6 Astra beats Claude Fable 5.1 on robot arm block task