Cohere Status · History · Incident #3115

RESOLVED

Chat models return 503 service error when /v1/chat requests omit message and chat_history while providing tool_results

Minor · Started Oct 18, 2025 · 9:46 PM

Duration

36m
Severity

Minor
Detection lead

—
User reports

—

Summary

Chat models return 503 service error when /v1/chat requests omit message and chat_history while providing tool_results

🎉 The issue has been resolved and we are back to normal.

Started

Oct 18, 2025 · 9:46 PM
Resolved

Oct 18, 2025 · 10:23 PM
Duration

36m
Severity

None

Event timeline

How this incident unfolded

◆

Identified
Oct 18 · 9:46 PM Cohere

🛠️ We have identified the root cause of the incident, and are working diligently to fix.
✓

Resolved
Oct 18 · 10:23 PM Cohere

🎉 The issue has been resolved and we are back to normal.

Pattern

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