Deep Dive · XiaoHu Explains
Anthropic's official playbook: use Claude Fable 5 as an "advisor," let Claude Sonnet 5 do the work and eat most of the bill
In advisor mode Fable 5 only gives advice; in orchestration mode Fable 5 dispatches tasks — either way, the lower-priced Sonnet 5 handles most of the actual work
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The original post is a first-hand account shared by Anthropic's official developer-facing account; the SWE-bench Pro / BrowseComp numbers are Anthropic's own internal benchmarks, not an independent third-party evaluation. This piece builds on the original post by digging into the corresponding official API docs and an official open-source notebook example, filling in the mechanics, code samples, and real-world pitfalls for both modes.
1Source
Who's behind this advice
Anthropic's official developer-facing account, @ClaudeDevs, shared two multi-model collaboration patterns the team uses internally on July 7, 2026.
Primary source and reference
- ClaudeDevs（X） Original publisher