Resolved after 2 hours 33 minutes, affecting Copilot AI Model Providers, on July 20, 2026.
This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available.
Affected components
Update timeline
- investigating Jul 20, 2026, 04:03 PM UTC
We are investigating reports of degraded performance for Copilot AI Model Providers
- investigating Jul 20, 2026, 04:04 PM UTC
We are investigating GPT Codex 5.3 performance.
- investigating Jul 20, 2026, 04:39 PM UTC
We identified that an upstream provider is returning errors for GPT 5.3 Codex requests, causing some users to experience failed or interrupted responses. Traffic is being automatically rerouted to mitigate impact. We are working with the upstream provider to resolve the underlying issue. We recommend using a different model at this time while we resolve the problem.
- investigating Jul 20, 2026, 05:21 PM UTC
The upstream provider continues to return intermittent errors for GPT 5.3 Codex requests. Some users may experience failed or interrupted responses when using this model. Traffic continues to be automatically rerouted to reduce impact, and we are actively working with the upstream provider on a resolution. In the meantime, selecting an alternative model will avoid disruption.
- investigating Jul 20, 2026, 06:25 PM UTC
We are seeing signs of sustained recovery from the upstream provider for GPT 5.3 Codex requests. Requests are succeeding as expected. We are awaiting confirmation from the provider that the issue is fully mitigated before resolving this incident.
- resolved Jul 20, 2026, 06:37 PM UTC
This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available.
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