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claude-code - 💡(How to fix) Fix [BUG] **Bug: VS Code extension forces 1M context on Pro plan — CLAUDE_CODE_DISABLE_1M_CONTEXT has no effect**

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Error Message

API Error: Usage credits required for 1M context · turn on usage credits at claude.ai/settings/usage, or use --model to switch to standard context

Code Example

API Error: Usage credits required for 1M context · turn on usage credits at claude.ai/settings/usage, or use --model to switch to standard context

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Preflight Checklist

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

What's Wrong?

Bug: VS Code extension forces 1M context on Pro plan with no way to disable it

Environment

  • OS: Windows 11
  • Claude Code version: 2.1.158
  • VS Code extension: Claude Code for VS Code (latest)
  • Plan: Claude Pro ($20/month)
  • Login method: claude.ai (firstParty)

Description The VS Code extension systematically triggers the 1M context window, which is not included in the Pro plan. This results in a permanent error:

API Error: Usage credits required for 1M context · turn on usage credits at claude.ai/settings/usage, or use --model to switch to standard context

The extension is completely unusable as a result.

What I tried

  • claudeCode.modelId: claude-sonnet-4-20250514 in settings.json → no effect
  • terminal.integrated.env.windows: { CLAUDE_CODE_DISABLE_1M_CONTEXT: 1 } → no effect
  • [Environment]::SetEnvironmentVariable("CLAUDE_CODE_DISABLE_1M_CONTEXT", "1", "User") at system level → no effect
  • claudeCode.environmentVariables: [{name: CLAUDE_CODE_DISABLE_1M_CONTEXT, value: 1}] → no effect
  • Full PC restart after each attempt → no effect
  • claude auth status confirms correct Pro account login, no API key set

What works Launching claude --model sonnet from the integrated terminal works fine. The problem is specific to the graphical VS Code extension panel.

Expected behavior The extension should default to standard 200k context on Pro plan, or provide a working UI option to select it.

Related issues

  • #39401 — model picker only shows 1M variants
  • #30033 — silent 1M default causing billing issues

What Should Happen?

Claude devrait fonctionner

Error Messages/Logs

Steps to Reproduce

  1. Login with Claude Pro account (claude.ai, firstParty)
  2. Open a PHP project in VS Code
  3. Open Claude Code panel (graphical, not terminal)
  4. Send any message

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

2.1.158

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

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claude-code - 💡(How to fix) Fix [BUG] **Bug: VS Code extension forces 1M context on Pro plan — CLAUDE_CODE_DISABLE_1M_CONTEXT has no effect**