Incident with the GPT-5.4 Nano model in GitHub Copilot and IDEs
On 2 November, GitHub reported increased errors and limited availability of the GPT-5.4 Nano model in Copilot products and IDEs. According to GitHub, the cause is an issue on the side of the upstream model provider.
On 2 November 2026 at 17:46 UTC, GitHub announced that it was investigating reports of increased errors with the GPT-5.4 Nano model in Copilot products and in IDE interfaces. At 17:58 UTC, GitHub updated the report to specify that this was degraded availability of this model, caused by an issue at the upstream model provider (the specific provider was not named in the source).
Details about the scope of impact, the duration of the incident, or its resolution are not provided in the source. See the source article for details.
Why it matters
This is a short-term operational incident on the service provider's side, not a change to the product, pricing, or features. It concerns users who were using the GPT-5.4 Nano model in Copilot or in IDEs at the time and may have encountered errors or slower response times.
Two audiences, two different impacts
What this means
For individuals
Users of GitHub Copilot using the GPT-5.4 Nano model may have encountered error responses or outages in code completion during the given time.
For a business
Companies relying on GitHub Copilot with the GPT-5.4 Nano model may have experienced a short-term interruption to assisted development; this is an incident on the provider's side, not a bug in internal systems.
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Event sources
clearly official source · 1 publisher, 0 independent. We count feeds from the same owner only once.