[BUG] Cowork 3P Gateway — Model picker ignores version and display name

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Product: Claude Desktop — Cowork on 3P (Gateway mode)
Platform: macOS
Gateway: GitHub Copilot (https://api.githubcopilot.com/)
Issue:
When using Gateway inference provider, the model picker displays truncated
model names — e.g. "Opus 4" instead of "Opus 4.7" or "Claude Opus 4.7".
This makes it impossible to distinguish between models of the same family
(claude-opus-4.7 vs claude-opus-4.6 vs claude-opus-4.5 all show as "Opus 4").
Additional context:

• GitHub Copilot's GET /models endpoint returns a "name" field with the full

display name (e.g. "Claude Opus 4.7") but Cowork ignores it.

• The /v1/models auto-discovery also fails because GitHub Copilot serves

models at /models (no /v1 prefix). Cowork should try both paths.
Expected behavior:

1. Display the full version number (4.7, 4.6, 4.5) in the picker
2. Ideally use the "name" field from the gateway's model list
3. Support /models in addition to /v1/models for auto-discovery

Workaround: Manually set inferenceModels with one model per family.

What Should Happen?

Expected behavior:

1. Display the full version number (4.7, 4.6, 4.5) in the picker
2. Ideally use the "name" field from the gateway's model list
3. Support /models in addition to /v1/models for auto-discovery

Error Messages/Logs

Steps to Reproduce

1. Install Claude Desktop on macOS
2. Enable Developer Mode: Help → Troubleshooting → Enable Developer Mode
3. Open Developer → Configure third-party inference
4. Configure Gateway provider:

• Inference provider: gateway
• Gateway base URL: https://api.githubcopilot.com/
• Gateway API key: <valid GitHub Copilot OAuth token>
• Gateway auth scheme: bearer

1. Set model list (inferenceModels) with multiple versions of the same family:

[claude-opus-4.7, claude-opus-4.6, claude-opus-4.5, claude-sonnet-4.6, claude-sonnet-4.5, claude-sonnet-4, claude-haiku-4.5]

1. Click Apply locally, quit Claude Desktop (Cmd+Q), relaunch
2. Select Cowork on 3P at the sign-in screen
3. Open the model picker in the Cowork tab

Expected Result:
Each model displays its full version — "Opus 4.7", "Opus 4.6", "Opus 4.5", "Sonnet 4.6", "Sonnet 4.5", etc. — matching what VS Code / GitHub Copilot shows ("Claude Opus 4.7").
Actual Result:
All Opus models display as "Opus 4". All Sonnet models display as "Sonnet 4". Impossible to distinguish between versions in the picker.
Additional Context:

• The gateway's GET /models endpoint returns a "name" field with the full display name (e.g. "Claude Opus 4.7") — Cowork ignores it.
• Auto-discovery via GET /v1/models fails (404) because GitHub Copilot serves models at /models without the /v1 prefix. Cowork should try both paths.
• The modelOverrides and ANTHROPIC_DEFAULT_*_MODEL_NAME env vars work for the Code tab but have no effect on the Cowork tab picker.
• Claude Desktop version: latest as of 2026-04-23
• macOS

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.3883.0 (93ff6c) 2026-04-21T17:24:01.000Z

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_