Skip to main content
HostTracker
HOST-TRACKER
website monitoring service
Status pages Instant check Price
Login Register

GitHub outage on September 16, 2026: Degradation with Gemini 3.8 Flash

GitHub reported an incident affecting GitHub for 10 hours 28 minutes on 16 September 2026, from 07:20 to 17:48 UTC.

github.com All times UTC

Resolved

Official incident reported by GitHub

Started
07:20
16 Sep 2026 UTC
Resolved
17:48
16 Sep 2026 UTC
Duration
10h 28m
10 hours 28 minutes
Impact
Major
as rated by GitHub
Updates
5
posted by GitHub

Timeline

All times UTC.

Official incident from GitHub

Degradation with Gemini 3.8 Flash

Resolved Major impact 16 Sep 2026 07:20 UTC View on GitHub's status page
  1. Official
    Investigating

    We are investigating reports of degraded availability for Copilot AI Model Providers

  2. Official
    Investigating

    Copilot AI Model Providers is experiencing degraded performance. We are continuing to investigate.

  3. Official
    Investigating

    Copilot AI Model Providers is experiencing degraded performance. We are continuing to investigate.

  4. Official
    Monitoring

    The degradation affecting Copilot AI Model Providers has been mitigated. We are monitoring to ensure stability.

  5. Official
    Resolved

    On September 16, 2026, between 04:40 and 11:45 UTC, the Gemini 3.8 Flash model in GitHub Copilot experienced degraded availability. Requests to this model failed at an average rate of 6.4%, and the impact was highest during peak traffic hours. Other Copilot models were not affected. Users could continue to work with a different model or with 'Auto'. The degradation was caused due to a capacity issue with an upstream model provider. Failure rates returned to normal as the daily traffic peak passed. We monitored the model until it was healthy and resolved the incident at 17:48 UTC. We are working to make our systems resilient to cover peak demand for all the Copilot models.

"Official" rows are quoted from GitHub's public status page, www.githubstatus.com. Very long posts are shortened.

What our checkpoints saw

HostTracker's checkpoints, which test github.com from several locations, recorded no outage of 5 minutes or longer during this incident. A provider can report a problem that affects only some features, regions or accounts, which a check of the main address does not see. The live GitHub status shows what our checks see right now.

All GitHub incidents Live GitHub status Every service we track

Does your product depend on GitHub?

An outage like this one reaches your users through your product, and most teams hear about it from a customer rather than from a dashboard. HostTracker watches any endpoint you name - your own site, an API you call, a vendor you resell - from 300+ locations, confirms a failure from several of them before it says anything, and then tells you by email, SMS, voice call or your chat tool.

You get the same record you are reading here for your own services: every outage timestamped, with the checks that observed it.

Start monitoring free Check another address

Independent measurement by HostTracker. Not affiliated with GitHub. Official updates are quoted from GitHub's public status page and remain GitHub's own words.