AnthropicLaunchAI ModelsSeptember 1, 2026

Anthropic launches Claude Fable 5.1

Claude Fable 5.1 is now live in Claude Code and the Claude Platform, priced the same as Fable 5 with 75% cheaper API cache reads ($0.25/MTok, down from $1/MTok). It scores 55.8% on Terminal-Bench 4.0, ahead of Fable 5 (42%) and Opus 5 (52.3%).

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