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Local routing mode only changes the Fable model: Claude Code

Quick fix

Upgrade to 4.0 or later; local routing writes Haiku, Sonnet, Opus, and Fable as routing aliases.

Symptom

Section titled “Symptom”
Error output
setting.json 只有 fable 模型被替换了,其他都走了映射:
English translation

In setting.json, only the fable model was replaced; the others were all mapped:

Cause

Section titled “Cause”

In 3.16.4, Claude Code’s model configuration in local routing mode may replace only Fable, while Haiku, Sonnet, and Opus still show their original models. The maintainer said that 4.0 reworked how local routing writes configuration: when routing is enabled, all four roles are written as routing aliases, and the actual model names are mapped in local routing. Another comment said the issue had existed since 3.15.

Fix

Section titled “Fix”

  1. Upgrade to 4.0 or later, then check whether Haiku, Sonnet, Opus, and Fable are all written as routing aliases in Claude Code’s settings.json.

  2. If the model fields are still inconsistent in the latest version, reply to the issue or open a new one and include the version and the provider’s model mapping configuration.

Affected Versions

Section titled “Affected Versions”
ToolClaude Code
Version3.15 至 3.16.4；维护者称 4.0 重做了配置写入，建议在最新版复测
PlatformsUnknown

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”
Why is only the Fable model replaced, while Haiku, Sonnet, and Opus are not?
The maintainer said that 4.0 reworked how local routing writes configuration. When routing is enabled, all four roles are written as routing aliases, and local routing maps the actual model names.
What should I do if the model fields are still inconsistent in the latest version?
Include the version and that provider’s model mapping configuration when reporting it in an issue.
Section titled “Related problems”
deepseek接入 模型勾选了1m: no 1M context option in Claude Code model pickerUpgrade cc-switch to v3.17.0+, leave the DeepSeek provider's ANTHROPIC_MODEL empty or check 1M there too, fill only Haiku/Sonnet/Opus mappings… (Claude Code)7 issues mergedDeepSeek Claude Code Configuration and Switching IssuesFirst confirm the issue type: new terminals or sessions reload configuration. For abnormal DeepSeek cache hit rates, try v3.16.3; other variants remain…15 issues mergedapi failed deserialize json body intoDepending on the error: roll Claude Code back, upgrade cc-switch, turn the local proxy off, or stop sending unsupported fields.8 issues merged

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