Claude Code 2.1.149 — All models blocked with "Usage credits required for 1M context" error

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?

Bug Description

Claude Code is completely blocked. Every command returns the same error before model selection can process.

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

Environment

• Platform: macOS
• Claude Code version: 2.1.149
• Plan: Pro
• Preferred model: Sonnet 4.6

Troubleshooting Attempted

✅ Downgraded to 2.1.149
✅ CLAUDE_CODE_DISABLE_1M_CONTEXT=1 environment variable
✅ --model flags (sonnet-4-6, haiku-4-5)
✅ Enabled usage credits in settings
✅ Config reset

All fail with same error. Error fires at authentication level before model flag processing.
Matches issues #62063, #62199, #63060.

What Should Happen?

1. Error fires immediately before model selection processes
2. Error occurs on every command, including claude --model claude-haiku-4-5-20251001
3. Enabled usage credits in settings — error still occurs
4. Tried environment variable CLAUDE_CODE_DISABLE_1M_CONTEXT=1 — error still occurs

Error Messages/Logs

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

Steps to Reproduce

1. Open Claude Code on Mac with Pro plan
2. Run any command (e.g., claude or claude --model claude-sonnet-4-6)
3. Error fires immediately before model selection processes
4. Error occurs on every command, including Haiku

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Before this week's update

Claude Code Version

2.1.149

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_