[BUG] API 400

I'm getting the same issue. And all the Claude GitHub actions are not working anymore either.
For me right now, login and logout are fixing the issue, but this issue seems to come back after a couple of hours

I'm getting the same issue. And all the Claude GitHub actions are not working anymore either. For now, login and logout are fixing the issue, but this issue seems to come back after a couple of hours

now i logout and login still can't solve this issue ...

have this issue too

same issue. any git related commands not work for me. login/logout doesn't help.

I have the same issue when run claude in macbook terminal

I have the problem as well

Same problem as well :)

started this morning

I just faced the same problem running Claude Code in PowerShell.
For now, logging out and logging back in has worked for me.

@ileardo that worked for me once , my second instructions resulted in the same error

@ileardo that worked for me once , my second instructions resulted in the same error

I've been using it for an hour since relogging in, and so far there have been no problems. I'll edit this comment if it stops working.

Same issue - regardless of prompt or instance

Re/Login hasn't worked for me

Same problem as well.

resolved by deleting env var anthropic key

same error started this morning any solution anyone?

resolved by deleting env var anthropic key

how can i do same because am using OAuth

See also #8046 and #8052

Same error for me when using claude-code terminal in VScode on Windows. It worked fine last night. Strange but the claude-code terminal works fine without error inside of a different set up > Windows, WSL VScode DDEV setup. No error there.

logout and login works for me.

Confirming claude /login fixes the problem for me, as per #8046

I have the same problem on MacOS 15.6.1, CC 1.0.120. Re-login didn't fix. Update: it worked on a second attempt. Over the last few days, I was showing Opus access despite being on a Pro plan; now it is back to normal (Sonnet only).

I also have the same problem after logging in / out / in. macOS 15.6.1 CC 1.0.120

I found the cause of the problem, because after the claude code update, the recommended configuration was updated, but this recommended configuration is not applicable to Pro subscribers.
You can use the /model command to see the model currently used by Claude Code, which will output:

│  Select Model                                                                │
│  Switch between Claude models. Applies to this session and future Claude     │
│  Code sessions. For custom model names, specify with --model.                │
│                                                                              │
│     1. Default (recommended)   Opus 4.1 for up to 50% of usage limits,       │
│                                then use Sonnet 4                             │
│     2. Opus                    Opus 4.1 for complex tasks · Reaches usage    │
│                                limits faster                                 │
│   ❯ 3. Sonnet                  Sonnet 4 for daily use ✔                      │
│     4. Opus Plan Mode          Use Opus 4.1 in plan mode, Sonnet 4           │
│                                otherwise

The default configuration uses the Opus 4.1 model, which is not available for the pro subscription, which is also the root cause of the error.
Select "3. Sonnet", problem solving.

Thank you @zorth44. You found the problem for my set up. It is working now after switching to Sonnet.

Logout and login solved the issue for me.

Also have this issue.

I’ve experienced this with an annual subscription, not expired. It wouldn’t even let me report the problem with ‘/feedback’

same

Thanks to @zorth44 .it works for me.

@zorth44 fix worked for me, but how claude code in github actions can be fixed? I tried to update credentials but doesn't work

@yuriyward - see my post here: https://github.com/anthropics/claude-code/issues/8046#issuecomment-3324496657

TLDR: You'll need to add "--model sonnet" to the "claude_args:" parameter of claude-code-review.yml

Does this mean that Claude Opus 4.1 is not included in Claude Pro anymore?

Does this mean that Claude Opus 4.1 is not included in Claude Pro anymore?

Not currently. It seems to come and go (I’ve only been using CC a month and we’d gone through different iterations on this).

I confirm what @lookbusy1344 says. When I started using CC 2 or 3 months ago (with a Pro account), only Sonnet was available. Opus showed up for 1-2 weeks for me, and now I see only Sonnet again. According to the Anthropic webpage, only Sonnet is available in CC with a Pro account, so I believe the temporary availability of Opus was a glitch.

I believe the temporary availability of Opus was a glitch.

@prtc yes my feeling too. A cautionary warning for us all to proof read what Claude puts into our code-bases 🙃

Although I’m not seeing the error from the command line any more, it’s still an issue with GitHub actions. Eg https://github.com/lookbusy1344/PicoArgs-dotnet/actions/runs/18008879575/job/51235820467

@lookbusy1344 - looking at your workflow definition, you haven't set the claude_args parameter to include '--model sonnet' This will fix the GitHub action.

@dusalex thanks for spotting that! It seems to be working now.

@lookbusy1344 - looking at your workflow definition, you haven't set the claude_args parameter to include '--model sonnet' This will fix the GitHub action.

that fixed the issue in github actions for me:
claude_args: '--model sonnet'

getting the same error here
y
⎿ API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"This credential is only authorized for use with Claude Code and cannot be used for other API
requests."},"request_id":"req_011CTaGdEyjjdVZo6rjiNLsQ"}

happening to me too, specifying /model sonnet solves the issue for now

for the recently released sonnet 4.5, use this instruction to fix it.
Tell this to your Claude Code or Codex Cloud

---

1. Open .github/workflows/claude.yml. In the Run Claude Code step, set claude_args to --model claude-sonnet-4-5-20250929, preserving every other setting in the workflow.
2. Open .github/workflows/claude-code-review.yml. In the Run Claude Code Review step, update the claude_args string so it starts with --model claude-sonnet-4-5-20250929 while leaving the quoted --allowed-tools list untouched.
3. Save both workflow files, commit with a message such as Add model argument to Claude workflows, and push the branch.
4. Open a PR describing that the general and review Claude workflows now request the Sonnet 4.5 model.

happening to me too, specifying /model sonnet solves the issue for now

Good call. I second typing /model sonnet in the CLI pulled me out of this Error: 400...

I also had this issue, it was a MCP server causing it.
Deactivate all MCP's, restart, then check again, then activate one by one your MCP's to catch the one causing it.
Cheers ! :)

Changing the model with /model resolved this error message for me

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