Anthropic Subscription Key not working anymore

[robertfels]

Description

When attempting to use Anthropic models (Opus/Sonnet) after authenticating with my Anthropic subscription, I receive the following error:

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

📅 The issue started around 6:00 AM UTC on January 28, 2026.

I have already tried logging out and back in — the issue persists.

I found similar issues reported previously where the suggested fix was to use the plugin opencode-anthropic-auth@0.0.7/0.0.8/latest. However, this workaround no longer resolves the problem.

Plugins

None

OpenCode version

1.1.37

Steps to reproduce

1. Log in using Anthropic Subscription credentials
2. Select an Anthropic model (Opus or Sonnet)
3. Run any prompt
4. Error appears: "This credential is only authorized for use with Claude Code and cannot be used for other API requests."

✅ Fix in place! Should it be registered automatically or manually:

Add the following to ~/.config/opencode/opencode.json:

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

Screenshot and/or share link

Operating System

macOS 26.2 (25C56)

Terminal

Terminal.app

[github-actions]

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

• This credential is only authorized for use with Claude Code #10936: This credential is only authorized for use with Claude Code (reported Jan 28, between 06:00-07:00 CET)
• fix: Claude Code API credentials #7456: fix: Claude Code API credentials (discusses the same error and suggests detecting Claude Code-specific keys)
• Claude Subscription is not working anymopre #7471: Claude Subscription is not working anymore (same error message and Anthropic login issue)
• Broken Claude Max #7410: Broken Claude Max (similar Anthropic credential authorization error)

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

[shandilyaaryan]

+1

[marcdix]

+1 - I also reported it here but closed it in favor of this one.

[nakdeyes]

UGH! I was flying an hour or two ago and just settled down for an evening of robot coding 🥀 . What can I do to help? Claude Code is garbo tier compared to OpenCode

[Sandipbgn]

+1

[hardme]

+1

[robertfels]

I've seen similar bug tickets here in the past with a solution like: "plugin": ["opencode-gemini-auth@0.0.7/0.0.8/latest"]. However, this solution doesn't seem to work currently either.

[marcdix]

I cancelled my Claude Code Max subscription. IMO that's the step ye all should do and write as the reason that they lock out their paying customers from using a software that actually works (Claude Code turned into absolute garbage in the last 2 weeks).

[mdaiter]

anomalyco/opencode-anthropic-auth#17 (comment)
^this worked for me, from @geohot

[LunVT1k]

+1

[robertfels]

@mdaiter that worked for me! Thanks

[konradbachowski]

+1

[konradbachowski]

anomalyco/opencode-anthropic-auth#17 (comment) ^this worked for me, from @geohot

also worked xD the weirdest hack i've seen today haha