Flux 1.1 Pro was the model that turned Black Forest Labs from a promising newcomer into the reference point for AI photorealism. Launched as the tuned successor to the original FLUX.1 Pro, it topped blind-preference leaderboards on release, generating faster than its predecessor while producing the composed, believable images that became the Flux signature.
The Ultra mode pushed it further: up to 4-megapixel output with a raw, less-processed photographic look that made 1.1 Pro Ultra a favorite for imagery meant to pass as an unedited camera frame. For a long stretch, “run it on 1.1 Pro” was simply the default advice for anyone chasing maximum realism.
Its role today is historical — and practical. Black Forest Labs has since shipped the Flux 2 generation, and Flux 2 Pro supersedes 1.1 Pro on fidelity, prompt adherence, and consistency. On Flux 3 AI you generate with that direct successor in the browser: the same lineage 1.1 Pro made famous, in its current strongest form, with free starter credits to test it on the prompts you used to run here.
See what's possible on Flux 3 AI
Sample generations from the platform — write your own prompt to see what Flux 1.1 Pro does with it.
What makes Flux 1.1 Pro stand out
The benchmark release
1.1 Pro led human-preference leaderboards on launch and defined what Flux photorealism meant.
Ultra 4MP mode
The Ultra variant rendered up to 4-megapixel images with a raw, camera-true finish.
Faster than its ancestor
BFL tuned 1.1 Pro to outpace the original FLUX.1 Pro while improving output quality.
A durable aesthetic
The composed light and natural depth that users loved carried straight into the Flux 2 line.
Succeeded, not abandoned
Flux 2 Pro is the direct upgrade path — same DNA, current-generation quality, hosted here.
Popular use cases
Why creators run Flux 1.1 Pro on Flux 3 AI
- Rerun your 1.1 Pro prompt library on its direct successor and compare within minutes.
- Free starter credits cover the test — no API key or BFL account required.
- The full current catalog sits alongside: Kontext for edits, Veo and Sora 2 for video.
Flux 1.1 Pro specs & capabilities
Output
- Generation modesText to Image
Flux 1.1 Pro prompt examples
Copy one as a starting point, or send it straight to the Create studio.
“Golden-hour portrait of a baker outside her shop, flour-dusted apron, warm side light, genuine mid-laugh expression, 85mm photographic depth”
The classic 1.1 Pro realism brief — see it on the current flagship
“Raw-style photo of a foggy pine trail at dawn, muted greens, faint sunrays through mist, handheld framing with natural imperfection”
The Ultra raw-mode look, reproduced on the Flux 2 generation
“Interior editorial shot of a sunlit ceramic studio, shelves of unglazed pots, dust motes in window light, quiet documentary tone”
Ambient-light coherence — the strength that built the Flux reputation
Create with Flux 1.1 Pro in three steps
Describe your idea
Write a prompt — the more specific the scene, motion, and style, the better Flux 1.1 Pro performs.
Pick Flux 1.1 Pro & settings
Choose your aspect ratio and options. The studio shows the exact credit cost before you generate.
Generate & download
Flux 1.1 Pro renders in the cloud — track progress in your library, then download watermark-free or share with a link.
Flux 1.1 Pro questions, answered
What is Flux 1.1 Pro?
Flux 1.1 Pro is Black Forest Labs’ previous-generation flagship text-to-image model — the tuned successor to FLUX.1 Pro that became the industry’s photorealism benchmark, with an Ultra mode reaching 4-megapixel output.
Can I still use Flux 1.1 Pro online?
Some API providers still serve it, but Black Forest Labs’ current line is Flux 2. On Flux 3 AI you generate with Flux 2 Pro — 1.1 Pro’s direct successor — which outperforms it on detail, prompt adherence, and consistency, on free starter credits.
What was Flux 1.1 Pro Ultra?
Ultra was 1.1 Pro’s high-resolution mode: up to 4MP output with an optional raw style that traded polish for camera-like authenticity. Its niche — large, natural-looking frames — is now served natively by the Flux 2 generation.
Flux 1.1 Pro vs Flux 2 Pro — how big is the jump?
Substantial. Flux 2 Pro improves fine detail, complex prompt handling, and reliability across styles while keeping the aesthetic that made 1.1 Pro popular. Prompts written for 1.1 Pro generally work unchanged and come back better.
Do my old Flux 1.1 Pro prompts still work?
Yes — the families share prompting style, so realistic-photography prompts, lighting language, and composition cues transfer directly to Flux 2 Pro. It is one of the easiest model migrations in AI imaging.
Is Flux 1.1 Pro free anywhere?
1.1 Pro was an API-only commercial model, so genuinely free access was always rare. The practical free route today is Flux 3 AI’s starter credits on Flux 2 Pro — no subscription required to try the current flagship.