What this error usually means
Diagnose OpenAI Base URL mismatch (404/405) by checking balance, Base URL, model permission, region/IP, and visible models before the next fix.
- Provider: OpenAI
- Error type: Base URL mismatch
- Status code: 404/405
Key error diagnosis
OpenAI | Base URL mismatch
Diagnose OpenAI Base URL mismatch (404/405) by checking balance, Base URL, model permission, region/IP, and visible models before the next fix.
Provider
OpenAI
global provider route
Error type
Base URL mismatch
medium
Status code
404/405
base-url-mismatch
Sample models
62
GPT-3.5 Turbo · GPT-3.5 Turbo (older v0613) · GPT-3.5 Turbo 16k
Error route summary
Error type
base-url-mismatch
medium
Provider
OpenAI
Status code
404/405
Read-only check. Detection data burns after 5 minutes.
Read-only check. Detection data burns after 5 minutes.
How to prove it during checking
Read-only check. Detection data burns after 5 minutes.
- Run read-only identity first: confirm whether the key really belongs to OpenAI, not just a compatible protocol.
- Then list models or run a lightweight probe: check whether models like GPT-3.5 Turbo · GPT-3.5 Turbo (older v0613) · GPT-3.5 Turbo 16k are visible and return stable evidence.
- Finally record 404/405, error body, latency, egress IP, and reproducibility to separate balance, permission, route, or upstream issues.
Next action
Base URL mismatch should not only show failed. The console should return the next move: refill balance, change Base URL, switch model, add permission, change egress IP, hold listing, or monitor.
- Read-only check. Detection data burns after 5 minutes.
- global provider route
- GPT-3.5 Turbo · GPT-3.5 Turbo (older v0613) · GPT-3.5 Turbo 16k