aiAI Status Monitor

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

ResolvedResolved · started Oct 18, 2025, 9:46 PM UTC (353d ago)

Was Cohere down? Cohere reported “Chat models return 503 service error when /v1/chat requests omit message and chat_history while providing tool_results” on Oct 18, 2025, 9:46 PM UTC. Full timeline below. This incident affects Cohere — see live Cohere status. Source: official vendor status feed.

Timeline

  1. Oct 18, 2025, 10:23 PM UTC

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

  2. Oct 18, 2025, 9:46 PM UTC

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

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