feat(claude): add claude-fable-5-1 and bump Claude Code fingerprint to 2.1.251 - #5405
feat(claude): add claude-fable-5-1 and bump Claude Code fingerprint to 2.1.251#5405gkinter wants to merge 1 commit into
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…o 2.1.251 Anthropic's /v1/models now returns `claude-fable-5-1` for subscription (OAuth) accounts, but the proxy rejects it with "unknown provider for model claude-fable-5-1" because it is missing from the embedded registry. Adding the model alone is not sufficient: Anthropic gates it on the advertised client version and returns "Claude Code 2.1.220 does not support this model; version 2.1.251 or newer is required. Run 'claude update' ..." so `defaultClaudeFingerprintUserAgent` is bumped from 2.1.220 to 2.1.251. Verified against a live subscription account: with both changes, `claude-fable-5-1` appears in /v1/models and chat completions succeed. Existing models (claude-fable-5, claude-opus-5, claude-sonnet-5) are unaffected. The registry entry mirrors claude-fable-5 (1M context, 128k max completion, thinking levels low..max, text+image in / text out).
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| const ( | ||
| defaultClaudeFingerprintUserAgent = "claude-cli/2.1.220 (external, cli)" | ||
| defaultClaudeFingerprintUserAgent = "claude-cli/2.1.251 (external, cli)" |
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Changing this baseline alters both the emitted User-Agent and the billing header version returned by DefaultClaudeVersion, but the committed executor tests still require claude-cli/2.1.220 and cc_version=2.1.220 (notably TestClaudeExecutor_NonClaudeRequestUsesClaudeCode220CLIFingerprint and TestClaudeExecutor_ConfirmedClaudeCodeRequestPreservesInteractiveIdentity). Consequently, the required go test ./... suite will fail once dependencies are available; update the affected fixtures and assertions alongside the baseline.
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Anthropic's
/v1/modelsnow returnsclaude-fable-5-1for subscription (OAuth) accounts, but the proxy rejects it withunknown provider for model claude-fable-5-1because it is missing from the embedded registry ininternal/registry/models/models.json.Adding the model alone is not sufficient. Anthropic gates it on the advertised client version and returns:
so this also bumps
defaultClaudeFingerprintUserAgentininternal/runtime/executor/helps/claude_device_profile.gofrom2.1.220to2.1.251.Verification
Built from this branch and run against a live Claude subscription account:
POST /v1/chat/completionswithclaude-fable-5-1->400 unknown provider for model400 Claude Code 2.1.220 does not support this model200, model echoes back asclaude-fable-5-1/v1/modelsgoes from 38 to 39 entries. Regression-checkedclaude-fable-5,claude-opus-5andclaude-sonnet-5— all still200.Notes
The registry entry mirrors
claude-fable-5: 1M context, 128k max completion,thinking levels
low..max,text+imagein /textout.🤖 Generated with Claude Code