Set `anthropic/claude-fable-5` in AI SDK to access a Mythos-class model that sustains multi-day autonomous work with adaptive thinking and higher first-shot correctness on complex problems.
Summary
Reduces human check-in overhead on long-running tasks like code review and repository investigation. Parallel sub-agent dispatch and adaptive effort settings let you shift resource allocation from supervision to exception handling.
Why it matters
Reduces human check-in overhead on long-running tasks like code review and repository investigation. Parallel sub-agent dispatch and adaptive effort settings let you shift resource allocation from supervision to exception handling.
Implementation verdict
Replaces prior Claude models for multi-step autonomous work. Requires AI SDK update and Anthropic API key. Ready now—30-day retention policy (no ZDR) is a hard constraint; blocking classifiers on cybersecurity/biology tasks narrow the surface. Worth testing on bug-finding and performance debugging workflows immediately.
Sources
Dev Signal
Get briefs like this in your inbox — free, every weekday.
100+ sources compressed into one 4-minute read. Ranked, cited, implementation-ready.