GPT-6 Astra vs Claude Fable 5.1: Who Wins?
OpenAI shipped GPT-6 Astra on 3 September 2026, two days after Anthropic shipped Claude Fable 5.1 . They land on the same list price — $10 per million input tokens, $50 per…
Ryan Mitchell8 min read
Tag
Anthropic
Every article tagged “Anthropic” on the Heyperai blog.
Claude Fable 5.1 vs Opus 5: Detailed Comparison
Anthropic shipped Claude Fable 5.1 on 1 September 2026, five weeks after Claude Opus 5 . On the price sheet the choice looks trivial: Fable 5.1 costs exactly twice as much per…
Ryan Mitchell9 min read