GPT-6 Astra is much cheaper and faster than Fable 5.1, but slightly behind on agentic loops

bindureddy · x · 2026-09-05

Bindu Reddy shared hands-on comparisons of GPT-6 Astra vs Fable 5.1:

• Astra is much cheaper and faster
• Slightly worse on long-running agentic loops
• Much better at browser use and 3D renders

She declared "OpenAI is back in the game," noting the model is already live on ChatLLM and Abacus AI Agent.

Related event: GPT-6 Astra early reviews: record ARC-AGI scores and big speed gains, but benchmark gaps spark debate(16 posts)→

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