What this error usually means
Diagnose Anthropic tools unsupported (400) by checking balance, Base URL, model permission, region/IP, and visible models before the next fix.
- Provider: Anthropic
- Error type: tools unsupported
- Status code: 400
Key error diagnosis
Anthropic | tools unsupported
Diagnose Anthropic tools unsupported (400) by checking balance, Base URL, model permission, region/IP, and visible models before the next fix.
Provider
Anthropic
global provider route
Error type
tools unsupported
medium
Status code
400
tools-unsupported
Sample models
13
Claude 3.5 Haiku · Claude 3.7 Sonnet · Claude 3.7 Sonnet (thinking)
Error route summary
Error type
tools-unsupported
medium
Provider
Anthropic
Status code
400
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 Anthropic, not just a compatible protocol.
- Then list models or run a lightweight probe: check whether models like Claude 3.5 Haiku · Claude 3.7 Sonnet · Claude 3.7 Sonnet (thinking) are visible and return stable evidence.
- Finally record 400, error body, latency, egress IP, and reproducibility to separate balance, permission, route, or upstream issues.
Next action
tools unsupported 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
- Claude 3.5 Haiku · Claude 3.7 Sonnet · Claude 3.7 Sonnet (thinking)
Open key check
Read-only check. Detection data burns after 5 minutes.
Open providers
Anthropic
Open models
Claude 3.5 Haiku · Claude 3.7 Sonnet · Claude 3.7 Sonnet (thinking)
Return to Claude Sonnet 4.6
After clarifying this error, jump back to the newest model and decide whether the failure changes how far you keep following it.