Copilot CLI adds GPT-5.3-codex and workspace MCP configs
GitHub Copilot’s CLI now supports GPT-5.3-codex with workspace-local MCP configs, and Microsoft published guidance on choosing the right Copilot model while users flagged UX and quota gaps. The CLI v0.0.407-0 adds support for gpt-5.3-codex and workspace-local MCP configuration via .vscode/mcp.json, plus numerous usability fixes and improvements [CLI v0.0.407-0 release notes](https://github.com/github/copilot-cli/releases/tag/v0.0.407-0)[^1]. Microsoft shared a practical model-selection guide for Copilot, while users requested premium request rollover and highlighted UX/Plan Mode issues; also note the VS Code 1.109.1 security recovery relevant to dev environments [model-selection guide](https://techcommunity.microsoft.com/blog/azuredevcommunityblog/choosing-the-right-model-in-github-copilot-a-practical-guide-for-developers/4491623)[^2], [premium request rollover](https://github.com/orgs/community/discussions/186654)[^3], [UX/Plan Mode concerns](https://github.com/orgs/community/discussions/186670)[^4], [VS Code 1.109.1](https://github.com/microsoft/vscode/releases/tag/1.109.1)[^5]. [^1]: Adds: Details the new model support, MCP config, and fixes in copilot-cli v0.0.407-0. [^2]: Adds: Guidance on which Copilot model to use by task type and enterprise considerations. [^3]: Adds: Community request signaling pain with monthly premium request caps. [^4]: Adds: Firsthand UX feedback on tool bloat, Plan Mode confusion, and reliability trade-offs. [^5]: Adds: Notes a security-related recovery update for VS Code that may affect Copilot users.