Error: Claude Sonnet - 401

[kharal50]

Error Details

Model: Claude Sonnet
Provider: anthropic
Status Code: 401

Error Output

{"type":"authentication_error","message":"invalid x-api-key"}

Additional Context
Please add any additional context about the error here

[continue]

Related Issues

Similar 401 Authentication Errors:

• Error: GPT-5 - 401 #9358 - Error: GPT-5 - 401
• Error: GPT-5 - 401 #9177 - Error: GPT-5 - 401
• Deepseek 401 Authentication Fails, Your api key: ****a205 is invalid #9378 - Deepseek 401 Authentication Fails
• Error: Codestral - 401oLj3U0wrqPlmP4zBJvKXjDJIxZxxKgHo #9316 - Error: Codestral - 401

Claude/Anthropic Authentication Issues:

• Claude #4383 - Claude
• HTTP 401 Unauthorized from https://api.anthropic.com/v1/messages {"type":"error","error":{"type":"authentication_error","message":"x-api-key header is required"}} #4243 - HTTP 401 Unauthorized from https://api.anthropic.com/v1/messages (x-api-key header required)
• Bug: Anthropic provider fails with Azure AI Foundry endpoints (incorrect auth header) #9009 - Bug: Anthropic provider fails with Azure AI Foundry endpoints (incorrect auth header) [CLOSED]

General API Key Issues:

• [Bug] API Key error (400/401) despite valid key, cannot resolve ${env:...} #7710 - [Bug] API Key error (400/401) despite valid key, cannot resolve ${env:...} [CLOSED]
• OpenRouter and Groq API keys return 401 despite working in curl (Continue v1.0.13) #6191 - OpenRouter and Groq API keys return 401 despite working in curl [CLOSED]
• It is NOT an error with my API key. i JUST made and replaced it three times. #5346 - It is NOT an error with my API key [CLOSED]