Is Cerebras Inference down? › Outage history › Feb 4, 2026
Cerebras Inference partial outage on Feb 4, 2026: what happened
On Feb 4, 2026, the Cerebras Inference status page reported "Partial Service Disruption Qwen 235B". About 9 hours 8 min: from Feb 4, 2026, 16:59 UTC to Feb 5, 2026, 02:07 UTC, by the official start and resolution times.
Cerebras Inference right now
At our last refresh (Oct 22, 2026, 12:35 UTC) Cerebras Inference was up: All Systems Operational.
- Started
- Feb 4, 2026, 16:59 UTC
- Resolved
- Feb 5, 2026, 02:07 UTC
- Duration
- 9 hours 8 min
- Official impact
- Major
- Affected
- Qwen-3-235B-Instruct-2507
- Source
- Partial Service Disruption Qwen 235B on the Cerebras Inference status page
The Cerebras Inference status page rated the impact "Major": a partial outage. Some parts or some users were affected; it was not a complete outage.
What caused the Cerebras Inference partial outage?
The Cerebras Inference status page has not published a cause. Its updates describe the symptoms only.
When was it fixed?
The Cerebras Inference status page marked it resolved at Feb 5, 2026, 02:07 UTC, 9 hours 8 min after it started. A fix was in place and being monitored from Feb 4, 2026, 18:53 UTC. Its resolution note: "Between 06:00 AM PT and 06:00 PM PT users experienced service disruption with Qwen 3 235B Instruct. We have taken action to address recent changes in traffic patterns and capacity, reducing the disruption. We plan to monitor this endpoint and evaluate restoring rate limits in the next week for Pay ..."
Timeline of official updates
Every update the Cerebras Inference status page posted, oldest first. Times are UTC.
Feb 4, 2026, 16:59 UTC investigating
Qwen 235B performance is degraded and temporarily unavailable for some service tiers. We are currently working to resume normal service performance. We will provide further updates as we make progress.
Feb 4, 2026, 18:53 UTC monitoring
As part of recent changes in traffic patterns and capacity, we are temporarily turning down rate limits for Pay-go users to help maintain a positive experience across the board. We understand the challenges this may create for you and your users, and we sincerely apologize for the inconvenience. We plan to monitor this endpoint and evaluate restoring rate limits in the next week. Thank you for your continued partnership and understanding, please reach out to our support team for any other questions.
Feb 5, 2026, 02:07 UTC investigating
Between 06:00 AM PT and 06:00 PM PT users experienced service disruption with Qwen 3 235B Instruct. We have taken action to address recent changes in traffic patterns and capacity, reducing the disruption. We plan to monitor this endpoint and evaluate restoring rate limits in the next week for Pay Go users.
Feb 5, 2026, 02:07 UTC resolved
Between 06:00 AM PT and 06:00 PM PT users experienced service disruption with Qwen 3 235B Instruct. We have taken action to address recent changes in traffic patterns and capacity, reducing the disruption. We plan to monitor this endpoint and evaluate restoring rate limits in the next week for Pay Go users.
Cerebras Inference partial outage questions
What caused the Cerebras Inference partial outage on Feb 4, 2026?
The Cerebras Inference status page has not published a cause.
When was the Cerebras Inference partial outage on Feb 4, 2026 fixed?
The Cerebras Inference status page marked it resolved at Feb 5, 2026, 02:07 UTC, 9 hours 8 min after it started. A fix was in place and being monitored from Feb 4, 2026, 18:53 UTC. Its resolution note: "Between 06:00 AM PT and 06:00 PM PT users experienced service disruption with Qwen 3 235B Instruct. We have taken action to address recent changes in traffic patterns and capacity, reducing the disruption. We plan to monitor this endpoint and evaluate restoring rate limits in the next week for Pay ..."
How long did the Cerebras Inference partial outage last?
About 9 hours 8 min: from Feb 4, 2026, 16:59 UTC to Feb 5, 2026, 02:07 UTC, by the official start and resolution times.
Was Cerebras Inference completely down?
No. The Cerebras Inference status page rated the impact "Major": a partial outage. Some parts or some users were affected; it was not a complete outage. The affected parts listed were: Qwen-3-235B-Instruct-2507.
Which parts of Cerebras Inference were affected?
The Cerebras Inference status page listed: Qwen-3-235B-Instruct-2507.
Other recent Cerebras Inference incidents
- Partial Service Disruption Sep 25, 2026, 12:16 UTC, 4 hours 58 min
- Resolved Aug 27, 2026, 12:05 UTC, duration not stated
- Partial Service Disruption Jul 29, 2026, 14:14 UTC, duration not stated
- Partial Service Disruption Jun 3, 2026, 14:09 UTC, 1 hour 30 min
- qwen-3-235b-a22b-instruct-2507 Service Unavailable May 1, 2026, 07:59 UTC, 58 minutes
- Service disruption with qwen-3-235b-a22b-instruct-2507 Apr 3, 2026, 10:42 UTC, duration not stated
Full Cerebras Inference outage history and biggest outages → · Recent outages across all services →
Quotes are the Cerebras Inference status page's own words, from the official incident. Is It Up or Down is independent and not affiliated with Cerebras Inference. Times are UTC.