Claude fable 5.1 is here
Terminal-Bench 4.0: Fable 5.1 → 55.8% Opus 5 → 52.3% Fable 5 → 42.0% Cache reads: $1.00 → $0.25/MTok Anthropic says typical workloads cost ~25% less, and highly agentic ones up to ~45% less Agents just got a serious upgrade
A bug nobody could explain for five years
Claude fable 5.1 found it in one session Anthropic shipped Fable 5.1 and Mythos 5.1 today same model, different safeguards it leads on all 7 benchmarks tested - ahead of Fable 5, Opus 5, and GPT-5.6 Sol on every one:
Wake up babe ! Claude just dropped another update after longtime!!
Fable 5.1 just beat opus 5 🔥💀
BREAKING: Anthropic has officially launched Claude Fable 5.1.
Replaces Fable 5 requires usage credits on Pro apparently burns through credits faster than Opus 5
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