claude ai-gateway long-context autonomous-agents code-intelligence

Claude Fable 5 launches on AI Gateway today

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

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

1.a notable step up over prior Claude models on long-running, ambiguous, multi-step tasks, executing end-to-end on work that previously required frequent human check-ins
2.The model sustains productive output across multi-day runs and dependably dispatches parallel sub-agents
3.Prompts and completions are retained for 30 days and are not used to train Claude
4.set model to `anthropic/claude-fable-5` in the AI SDK

Dev Signal

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