Historical
Cohere · Incident record · Oct 18, 21:46 UTC

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

Historical record · source provider_api · confidence high
10/100
User-Impact Score · Informational
2025-10-18 21:47 UTC — UIS 10
startedresolved

37m · Cohere · scope unspecified · historical record (live confirmation cannot be fabricated retroactively).

Cite this incidentBibTeX · APA · MLA · Chicago · RIS
ai-receipts. (2025, October 18). Chat models return 503 service error when /v1/chat requests omit message and chat_history while providing tool_results [Incident record, methodology v1.0]. ai-receipts. https://aireceipts.org/incidents/cohere:01K7WMKZTGGPADA69MEAE9P4TY
Embed this incidentiframe · CC-BY-4.0
<iframe src="https://aireceipts.org/incidents/cohere:01K7WMKZTGGPADA69MEAE9P4TY?embed=1" title="Cohere: Chat models return 503 service error when /v1/chat requests omit message and chat_history while providing tool_results — ai-receipts incident record" width="100%" height="420" loading="lazy" style="border:1px solid #e4e4e7"></iframe>
<p><a href="https://aireceipts.org/incidents/cohere:01K7WMKZTGGPADA69MEAE9P4TY">Source: ai-receipts</a> · CC-BY-4.0</p>

Data record

UIS
10/100
Status
resolved
Started (UTC)
2025-10-18 21:46
Duration
37m
Components
—
Scope
scope unspecified — see methodology limitations
Confirmation
Historical record. Live multi-source confirmation cannot be fabricated retroactively.
Methodology
v1 · how this score was computed · provider status page

Evidence chain

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