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FLUX image models

Direct answerFLUX.2 officially separates klein, max, pro, and flex for fast local inference, maximum consistency, production quality, and typography, with different APIs and licenses.

Updated · Reviewed

Current official portfolio

BFL's FLUX.2 overview positions [klein] for sub-second and open-weight use, [max] for maximum editing consistency and knowledge, [pro] for production generation and editing, and [flex] for typography and fine detail.

API and open weights

A family can include hosted APIs, distilled weights, and Base weights. The 4B and 9B licenses differ, and Base variants suit training or research but may not be on the public API; “open” alone does not establish commercial rights.

Choosing within the family

Evaluate klein for local high throughput, max for difficult editing and reference consistency, pro for routine production assets, and flex for posters or layout. Compare prompt adherence, text, people, color, and detail retention on real work.

API use

This site normally submits image generation or editing jobs; direct BFL workflows may create asynchronous tasks and retrieve results. Size, aspect ratio, seed, references, and format are model-specific.

Rights and limits

Verify rights to input assets and likenesses, output terms, non-commercial licenses, moderation, and result retention. Image or megapixel pricing is not directly comparable with token models.

Use cases

  • Image generation
  • Image editing
  • Typography control

API protocols

  • /v1/chat/completions

FAQ

Is the model name permanent?

No. Official aliases can move and enabled API IDs can change; pin a tested ID in production and verify availability separately in the model marketplace.

How should I choose among fast, production-quality, editing-consistency, and typography FLUX variants?

Evaluate fast open-weight tiers for local throughput, capability-first tiers for difficult editing and reference consistency, production tiers for routine assets, and typography-focused tiers for posters and layout. Compare text, people, color, and detail retention on real prompts and references.

Do hosted FLUX APIs, distilled weights, and Base weights share one protocol and license?

No. Hosted APIs may use asynchronous jobs and result retrieval, while local runtimes define weight-serving protocols. Licenses can also differ by size, distilled, and Base variant. Verify temporary-result retention, rights to inputs and likenesses, and output terms.

  • Black Forest LabsFocused on high-quality image generation and editing across realtime previews, production workflows, and fine-grained control.
  • Image generation and vision model guideVision understanding and image generation use different interfaces; generation projects must validate prompt adherence, editing consistency, text, likeness rights, moderation, and output terms.

Official sources

  1. FLUX Overview Official