The most reliable FLUX 1.1 Pro API,with $500 in matched credits.
BFL's closed-API tier on Runflow. Sub-10s FLUX 1.1 Pro, 4 MP FLUX 1.1 Pro Ultra, raw mode for unretouched photography. Same per-image price as Black Forest Labs. Dollar-for-dollar credit match up to $500.
SOUND FAMILIAR?
What breaks when you call FLUX 1.1 Pro directly.
Same model, different reality once it's in production.
Failed generations
Provider returns 5xx. Generations fail mid-pipeline. Your users see errors and you pay for the retry.
Quality drift
Outputs drift over time. You can't tell which prompts perform. Bad images reach users before anyone notices.
No fallback path
When your AI provider goes down, your pipeline goes down. No fallback.
Glue everywhere
Polling loops, retry logic, error handling. Every team rebuilds the same scaffolding.
Three steps. Zero failures.
Send your request
Same params as any other provider. Swap the endpoint, keep your code.
Auto-failover until it works
If a generation fails, we retry on our infrastructure. You never see the failure. You never pay for it.
Sentinel scores the output
Face fidelity, color accuracy, artifacts, resolution. Scores land in your dashboard so you know exactly what shipped.
Evaluate
See what you are actually shipping.
Every FLUX 1.1 Pro generation through Runflow is evaluated by Sentinel. You get quality insights on every output: what went well, what went wrong, and where to improve your prompts.
Evaluations
2,924
last 30 days
Pass rate
89.53%
of all evaluations
Avg score
0.91
out of 1.00
Gate failures
20
0.7% of evaluations
Failed judges
1,133
0.4 per evaluation
Regenerate rate
9.68%
lower is better
Catches bad inputs before you spend on a generation.
Every result graded against the checks that matter.
One ID ties the input, the score, and the retry together.
Improve quality and user experience at the same cost.
Sentinel scores every output on face fidelity, color match, artifacts, and resolution. Pick the mode that fits your pipeline.
Discard bad generations automatically.
Adds a few seconds. If a face, color, or score fails your threshold, the image is discarded and a fresh generation is triggered with the failure mode flagged.
Built for FLUX 1.1 Pro at scale.
Sub-10s Pro generations
FLUX 1.1 Pro returns photoreal output in under 10 seconds at standard resolution. Runflow adds zero overhead between the request and the model.
Automatic failover
When a generation fails, Runflow retries on our infrastructure. Your users never see an error.
4 MP Pro Ultra in the same integration
Switch between standard Pro and 4 MP Pro Ultra without swapping integrations. Raw mode for unretouched photography included.
Sentinel analytics included
Every output scored for face fidelity, color match, artifacts, and resolution. See your quality trends in a dashboard.
Same price as Black Forest Labs
Per-image pricing mirrors BFL's published rate. Sentinel, dashboards, and auto-failover are included at no extra cost.
Free credits to prove it
Free credits on signup. Enough to run your own reliability test.
FLUX 1.1 Pro and Pro Ultra. One API.
Every variant includes auto-failover and Sentinel quality analytics.
| Model | Category | 1MP | 4MP |
|---|---|---|---|
| FLUX 1.1 [pro] | Text-to-image | $0.04/image | - |
| FLUX 1.1 [pro] Ultra | Text-to-image | - | $0.06/image |
Enterprise-grade AI image generation API infrastructure.
Without the enterprise sales cycle.
Your images never touch our storage. Processing happens in isolated environments with automatic cleanup. Compliant by default.
SOC 2 Type II compliant.
Zero customer data retention
Images are processed and returned. We don’t store your customers’ data.
Isolated processing
Every job runs in its own sandboxed environment. No cross-contamination between customers.
99.9% uptime SLA
Multi-region infrastructure with automatic failover. GPU capacity is always available.
FLUX 1.1 Pro API: common questions
Match your first $500 in credits.
Deposit any amount in your first 30 days and we add a matching credit within 24 hours, up to $500 in total. Put $500, you get $500 back.
Stop losing generations.
Start seeing quality.
Free credits on signup. Match your first $500 in credits, dollar for dollar.