Claude Code for VS Code - Auto-update broke authentication and removed Opus 4.6 from model selector

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?

Hi Anthropic Team,

I'm writing to report a critical issue with the Claude Code for VS Code extension (v2.0.13) that occurred after a recent auto-update.

Environment:

• IDE: Antigravity (VS Code fork using Open VSX)
• Extension: Claude Code for VS Code v2.0.13
• CLI: Claude Code v2.1.37
• Plan: Claude Max 5x ($100/month)
• OS: Windows

What was working before:

• Opus 4.6 was available in the model selector dropdown
• Authentication was active and persistent
• Everything was functioning correctly until the night of Feb 9, 2026

What broke after the auto-update:

1. Authentication was reset — the extension showed the login screen as if I had never logged in, with no way to re-authenticate through the extension UI
2. The model selector dropdown now only shows "Default (Sonnet 4.5)" and "Opus 4.1" — Opus 4.6 is completely missing despite being on the Max plan
3. The claude-code.selectedModel setting does not accept custom model strings — changing it to "claude-opus-4-6" gets overridden by the hardcoded dropdown options
4. Reinstalling the extension multiple times did not fix the issue

Workaround:

• Installing the CLI globally (npm install -g @anthropic-ai/claude-code) and running claude login from the terminal restored Opus 4.6 access in the terminal
• However, the extension's native UI panel still only shows Opus 4.1
• Using claude-code.useTerminal = true works as a temporary fix

Expected behavior:

• The extension should persist authentication across updates
• Opus 4.6 should appear in the model selector for Max plan subscribers
• The selectedModel setting should accept valid model strings like "claude-opus-4-6"

This disrupted my workflow significantly. Please look into fixing the model selector and authentication persistence in future updates.

Thank you,
Shakti Motani
shaktimotani@gmail.com
Claude Max 5x Subscribe

What Should Happen?

Bug Description

After the Claude Code for VS Code extension auto-updated to v2.0.13, authentication was reset and Opus 4.6 disappeared from the model selector.

Environment

• IDE: Antigravity (VS Code fork, Open VSX marketplace)
• Extension version: 2.0.13
• CLI version: 2.1.37 (installed manually after the bug)
• Plan: Claude Max 5x ($100/month)
• OS: Windows
• Node: v24.12.0
• npm: 11.6.2

What was working before

• Opus 4.6 was available in the model selector
• Authentication was active and persistent
• Everything worked correctly until the night of Feb 9, 2026

What happened after auto-update

1. Authentication was reset — extension showed login screen with no way to re-authenticate
2. Model selector only shows "Default (Sonnet 4.5)" and "Opus 4.1" — Opus 4.6 is missing
3. Changing claude-code.selectedModel to claude-opus-4-6 gets overridden by the hardcoded dropdown
4. Reinstalling the extension multiple times did not fix the issue
5. Claude CLI was not installed globally — the previous extension version likely bundled its own

Steps to Reproduce

1. Have Claude Code extension installed with active Max 5x subscription
2. Let extension auto-update to v2.0.13
3. Open the extension panel — login is gone
4. Check model selector — only Sonnet 4.5 and Opus 4.1 available

Workaround

• Installed CLI globally: npm install -g @anthropic-ai/claude-code
• Ran claude login from terminal — Opus 4.6 works in CLI
• Set claude-code.useTerminal = true as temporary fix
• Native UI panel still only shows Opus 4.1

Expected Behavior

• Authentication should persist across extension updates
• Opus 4.6 should appear in model selector for Max plan subscribers
• selectedModel setting should accept valid model strings like claude-opus-4-6

Screenshots

[Attach your screenshots here]

Error Messages/Logs

Steps to Reproduce

asd

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

sa

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_