[BUG] Can't use calude code using this proxy

[acedreamer]

Bug Description
I can't use the claude code unlike in the past weeks. whenever I write something, it gives just this "This version of Antigravity is no longer supported. Please update to receive the latest features".

Steps to Reproduce
1.
2.
3.

Expected Behavior
Write/code the request

Actual Behavior
Shows up a error message ( This version of Antigravity is no longer supported. Please update to receive the latest features! ).

Environment

• Claude Code version: v2.1.44
• antigravity-claude-proxy version: latest
• Operating System: Windows 11
• Node.js version: idk

<img width="1483" height="762" alt="Image" src="https://github.com/user-attachments/assets/4a5f870b-5fa7-4013-96a4-7a864fb4da8c" [/>]

Claude CLI Configuration
Please provide ONE of the following:

• Screenshot of WebUI Settings → Claude CLI tab, OR
• Contents of your Claude settings.json file:
  • macOS/Linux: ~/.claude/settings.json
  • Windows: %USERPROFILE%\.claude\settings.json

{
  "autoUpdatesChannel": "latest",
  "env": {
    "ENABLE_EXPERIMENTAL_MCP_CLI": "true",
    "ANTHROPIC_AUTH_TOKEN": "test",
    "ANTHROPIC_BASE_URL": "http://localhost:8080",
    "ANTHROPIC_MODEL": "claude-opus-4-5-thinking",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "claude-opus-4-5-thinking",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "claude-sonnet-4-5-thinking",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "claude-sonnet-4-5",
    "CLAUDE_CODE_SUBAGENT_MODEL": "claude-sonnet-4-5-thinking"
  }
}

Logs (if applicable)

Checklist
Please confirm:

• I've updated antigravity-claude-proxy to the latest version
• The bug exists in the latest version
• I'm using this proxy for personal development only
• I have an active Google Cloud project with Antigravity enabled
• This issue is not related to attempting commercial use or TOS violations
• I've reviewed the README troubleshooting section

Additional Context
Add any other relevant information.

[xnnnc]

use opus 4.6, opus 4.5 is disabled