Cerebras rate limits, context window & usage caps (2026)
Rate limits, context window, message limits, file upload caps and image generation limits — all Cerebras plans compared.
What happens when you hit Cerebras's limits?
Check the reset window — most limits refresh within 1–60 minutes
Reload or try again after the reset window passes
If you hit limits regularly, upgrade your plan to increase caps
Cerebras limit reset schedule
⚡
Per minute
API RPM limits — reset every 60 seconds
🕐
Per hour
Short rolling windows for message quotas
⏱
Per 5 hours
Common for consumer plan message limits
📅
Per day / month
Image gen credits and file storage caps
Exact reset period per limit type is shown in the "Notes" column of the plan table above. Cerebras uses rolling-window resets — quotas refresh continuously, not at a fixed midnight cutoff.
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Limits sourced from Cerebras Systems's official documentation. Updated when plan changes are announced.
Cerebras limits — frequently asked questions
What is the Cerebras message limit?
Cerebras does not publicly publish a hard message limit. Usage may be throttled during high demand.
Does Cerebras have a file upload limit?
Yes, Cerebras enforces file upload limits that vary by plan. See the detailed breakdown above.
When do Cerebras limits reset?
Reset periods vary by limit type — many Cerebras limits reset on a rolling window (e.g., per 5 hours or per 24 hours). Check the notes column in the table above for specific reset schedules.
What happens when you hit Cerebras's rate limit?
Cerebras will temporarily block new requests when you exceed your plan's limits. You may see an in-app message or receive an HTTP 429 response. Wait for the reset window to pass or upgrade your plan.