Model
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Model
Trends
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ang pinakamahuhusay na open source AI model

Flex.1 Alpha by Ostris: the open, fine-tunable Flux cousin

Flex.1 Alpha is an 8B Apache-licensed model derived from Flux Schnell with a guidance embedder. Learn how its guidance differs, the settings that work, prompting, and why it is a favorite base for training.
Paksa: Mga model
Ni Captain
Inilathala 2026-09-30
Hindi pa naisasalin ang pahinang ito, kaya ipinapakita ito sa Ingles.

Pangkalahatang-ideya

Flex.1 Alpha by Ostris is an 8-billion-parameter rectified-flow model built from
FLUX.1
Schnell, with the distillation removed and a trainable guidance embedder added. It is released under Apache 2.0, which makes it one of the few Flux-class models that can be fine-tuned and used commercially without restriction.
Prompting is like Flux: natural sentences, no
negative prompt
by default. Because the guidance embedder is separate, you can bypass it and use true classifier-free guidance when you want a negative prompt.

Sanggunian

Pangalan
Uri
Ano ito
Prompt
text
Natural sentences as with Flux.
Guidance
3-4
3.5 default with the embedder. Set to 1 and use
CFG
3-5 if you bypass it.
Steps
25-50
It likes a few more steps than Dev; 30 is a good baseline.
Resolution
1 MP
1024x1024 and standard ratios.
LoRAs
Flex / Dev
Flex
LoRAs
are ideal; many Dev LoRAs work at reduced strength.
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Hakbang-hakbang

  1. Prompt in sentences and set guidance 3.5, steps 30.
  2. Compare with the same seed at 50 steps; fine detail improves more than on Dev.
  3. If you need to exclude something, bypass the guidance embedder and use CFG 4 with a negative prompt.
  4. Add a Flex-trained LoRA at 0.8-1.0.
  5. For training, use it as a base: its open license and un-distilled weights are the reason it exists.

Mga halimbawa

Illustration

A flat vector-style illustration of a lighthouse keeper's cottage at night, warm windows, stars, limited palette of navy, mustard and cream.

Photograph

A photograph of a mechanic's hands adjusting a bicycle derailleur, grease, soft workshop light, 50mm, shallow focus.

Creative idea: CFG with a negative

A busy farmers market in watercolor, loose washes, lots of white paper. Negative: photo, 3d render, text
Guidance embedder bypassed, CFG 4

Mga tip

  • Flex keeps more of Schnell's bright, graphic look than Dev; it suits illustration and design.
  • Text rendering is decent but below Dev; keep words short.
  • Lower guidance (2.5) gives surprisingly natural photographs.
  • It is smaller than Dev and runs faster on the same hardware.

Pag-aayos ng problema

Output is washed out

Bakit ito nangyayari
Guidance too low with the embedder active.

Paano ayusin
Raise guidance to 3.5-4 or add stronger light and color words.

Dev LoRA causes artifacts

Bakit ito nangyayari
Partial compatibility.

Paano ayusin
Lower the LoRA to 0.5 or use a LoRA trained on Flex.

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Mga tanong

Is it commercially usable?

Yes, Apache 2.0.

Is it the same quality as Flux Dev?

Close in many prompts, a little behind in text and fine portraits, ahead in licensing and trainability.

Mga link at pinagmulan

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