fix: Claude Code API credentials

[wlshlad85]

Question

Problem

When using Anthropic credentials from Claude Code (the official Anthropic CLI), OpenCode displays:

"This credential is only authorized for use with Claude Code and cannot be used for other API requests."

This warning appears but doesn't guide users on what to do next.

Expected Behavior

Either:

1. Detect Claude Code-specific keys and prompt users to enter a standard Anthropic API key instead
2. Add documentation clarifying that Claude Code credentials won't work with OpenCode

Environment

• Windows 11
• OpenCode TUI
• Model: Claude Opus 4.5

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Claude code isn't working in opencode #5318: Claude code isn't working in opencode
• Question: How does opencode work with Claude Code OAuth tokens when AI SDK fails? #417: Question: How does opencode work with Claude Code OAuth tokens when AI SDK fails?
• Using opencode with Anthropic OAuth violates ToS & Results in Ban #6930: Using opencode with Anthropic OAuth violates ToS & Results in Ban
• [Question] How did you get Anthropic OAuth credentials? #1461: [Question] How did you get Anthropic OAuth credentials?

Feel free to ignore if none of these address your specific case.

[davejfranco]

After the las update I'm experiencing the same issue on MACOS

[ZGltYQ]

Same

[osullivandonal]

I am seeing the same issue on Linux with Claude Sonnet 4.5

[chrisayl]

Ditto, troubleshooting with Claude:

There's the issue. Your OpenCode Anthropic auth is OAuth-based (Claude Pro/Max subscription). These credentials are restricted by Anthropic - they can only be used for the main Claude Code/OpenCode session, not for spawning additional API calls to other models like haiku.

  The problem:
  - Your explore agent is set to anthropic/claude-haiku-4-5
  - Your librarian agent is set to anthropic/claude-sonnet-4-5
  - OpenCode tries to spawn these using your Claude Pro/Max OAuth credentials
  - Anthropic rejects: "This credential is only authorized for use with Claude Code"

  Solutions:

  Option 1 - Use different models for those agents (recommended):
  {
    "agents": {
      "explore": { "model": "openai/gpt-4o-mini" },
      "librarian": { "model": "openai/gpt-4o" }
    }
  }
  Since you have OpenAI OAuth configured, those should work.

  Option 2 - Get a separate Anthropic API key:
  Set ANTHROPIC_API_KEY environment variable with a pay-as-you-go API key (not Claude Pro/Max). OpenCode should prefer this for direct API calls.

  Option 3 - Use Google models:
  {
    "agents": {
      "explore": { "model": "google/gemini-3-flash" },
      "librarian": { "model": "google/gemini-3-pro-high" }
    }
  }

  The Claude Pro/Max OAuth only works for the main orchestrator model - subagent spawning with other Anthropic models requires a proper API key.

[igordertigor]

Same here on linux and independent of the specific model.

[andersonkrs]

Same on Arch

[b1naryDS]

It might be anthropic cracking down, see this issue on clawdbot

[ramirlm]

It's anthropic closing the doors. Also happening on OpenCode

[angelguillen10]

same here

[kevinefiles]

Guys this was fixed a few hours ago. It will get pushed but if you want to fix locally you can find the details here #7410

[seuros]

This message is happening for few months now, it is not consistent.

But this is expected! the TOS (if you read it), do prevent the subscription usage outside CC and CD. They can detect it with pattern that CC don't do. or if you switch model mid conversation.

[harshav167]

this is solved. anomalyco/opencode-anthropic-auth#11

[angelguillen10]

This worked for me:

• Updated ~/.config/opencode/opencode.json to add opencode-anthropic-auth@0.0.7:

    "plugin": [
    "opencode-anthropic-auth@0.0.7",
  ],

• Then restart OpenCode and run opencode auth login (choose Anthropic/Claude).