
Claude Fable 5.1 vs GPT-6 Astra: Coding, Agents & Cost
Both list at $10/$50 and both are callable on EvoLink. Cache reads cost 4x more on GPT-6 Astra; agent controls and benchmark evidence differ. Run a matched evaluation.
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Both list at $10/$50 and both are callable on EvoLink. Cache reads cost 4x more on GPT-6 Astra; agent controls and benchmark evidence differ. Run a matched evaluation.

OpenAI released GPT-6 Astra on September 3, 2026. See the confirmed specs, the rollout by channel (API, Azure, Bedrock, IDEs), and how to call it on EvoLink.

Compare 1.05M vs 1M context, $10/$50 vs $5/$25 list pricing, tooling, and when to route GPT-6 Astra or keep Claude Opus 5 as a fallback.

Migrate or hold? Compare $10/$50 vs $4/$20 list prices, published index scores, cache and 272K long-context rules, and a routing rule for GPT-6 Astra vs GPT-5.6 Sol.