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FLUX.2 [klein] 4B API status

Operational

Is FLUX.2 [klein] 4B down right now? No. FLUX.2 [klein] 4B is up and completing generations normally.

Last check
100% uptime over 30 days

Uptime

FLUX.2 [klein] 4B uptime

Each bar is a day (or an hour) of checks every five minutes and finished generations; only failures on our side count. Hover or tap a bar for its details. All models' status

24 hours
100%
No incidents
7 days
100%
No incidents
30 days
100%
No incidents
90 days
100%
No incidents

Last 30 daysLast 90 days

  • Uptime
  • ≥ 99%
  • 95–99%
  • < 95%
30 days ago90 days ago100% uptime100% uptimeToday

Last 24 hours

24 hours ago100% uptimeNow

Speed

Generation time

Median time from submitting a request to a finished output, per task, over the generations that succeeded in the last 7 days. Across all tasks in the last 24 hours: 2s. Resolution, length and queue all change it.

History

Recent incidents

An incident is a stretch of hours in which a check found the model unusable, or at least a quarter of its generations (two or more) failed on our side. Times are in UTC.

No incidents in the last 90 days.

If it's down

If FLUX.2 [klein] 4B is down

CheaperGen runs FLUX.2 [klein] 4B from its open weights on GPU inference for open-source models, below the official price, with automatic routing. The routing is what keeps FLUX.2 [klein] 4B running when capacity fails.

Automatic routing

We check FLUX.2 [klein] 4B every five minutes and send each request to healthy capacity automatically. If nothing can take a request, it's declined up front and nothing is charged.

Failed generations are refunded

If a generation fails, the price held when you submitted goes back to your balance in full, automatically. The error says why and whether a retry can help. Error handling

A disclosed emergency price

When only pricier capacity is left, a request can run at the emergency price: never above the official price, and shown before it runs. On the API, allow_fallback_price: false keeps you at the standard price. Emergency price

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FAQ

FLUX.2 [klein] 4B status questions

Every model's live state is on the status page.

No. FLUX.2 [klein] 4B is up and completing generations normally. Last checked Oct 25, 2026, 21:05 UTC; uptime over the last 30 days: 100%. This page updates every five minutes.

Every five minutes we check whether FLUX.2 [klein] 4B can be served, and we count every generation that finishes. Uptime is the share of those observations that found it working: 1 − (checks that found it unusable + generations that failed on our side) ÷ (all checks + all finished generations). Failures caused by the request itself, like a blocked prompt or an unreadable file, don't count, and degraded performance or the emergency price still count as up. A day with nothing recorded counts as fully available. Bars are green from 99%, amber from 95% and red below.

No. CheaperGen is independent of Black Forest Labs, and this page doesn't monitor Black Forest Labs' own console or API. It shows FLUX.2 [klein] 4B as served by CheaperGen from its open weights on GPU inference for open-source models, measured by our own health checks and the generations that run here: whether FLUX.2 [klein] 4B works on CheaperGen right now.

It's refunded automatically: the price held when you submitted goes back to your balance in full, and the generation's error says why and whether retrying can help. If nothing can take a request, it's declined before anything is charged.

Run FLUX.2 [klein] 4B now

Generate in the Studio, or call FLUX.2 [klein] 4B from your code with one API key. Failed generations are refunded automatically.

Open in Studio API reference
curl -X POST https://cheapergen.com/api/v1/run/bfl/flux-2-klein-4b/text-to-image \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "…"}'