FLUX.2 [klein] 4B
Jan 2026
FLUX.2 [klein] 4BCompare inon
FLUX.2 [klein] 4B measured on 5 of 9 Image Generation & Editing benchmarks5
BenchmarkByScoreRank
Multimodal4
Text rendering1
No benchmark matches
Rankingconfiguration unstated?
Full ranking →···
82Luma Photon84383FLUX.2 [klein] 4B83784Phoenix 0.9 Ultra833Strong at
Alternatives?
ModelScoreCostPriceWhat changes
CheaperMuse Imageunstatedwins 84%-33%$0.01BetterFLUX.2 [dev] FlashOpenwins 71%-67%$0.005Memory (4-bit): not verified
OpenQwen Image 2.1unstatedwins 76%+33%$0.02Memory (4-bit): 2.3 GB → 4.2 GBPCheaperP Image Ideogramhighwins 71%-33%$0.01Edits photos: not verified
CheaperIdeogram 4.0 FastOpenwins 70%-30%$0.011Edits photos: not verified+1ModelScoreCostPriceWhat changes
Muse Imageunstatedwins 84%-33%$0.01PP Image Ideogramhighwins 71%-33%$0.01Edits photos: not verifiedFLUX.2 [dev] FlashOpenwins 71%-67%$0.005Memory (4-bit): not verifiedIdeogram 4.0 FastOpenwins 70%-30%$0.011Edits photos: not verified+1Ideogram 4.0 InstantOpenwins 70%-50%$0.007Edits photos: not verified+1ModelScoreCostPriceWhat changes
FLUX.2 [dev] FlashOpenwins 71%-67%$0.005Memory (4-bit): not verifiedZ-Image TurbounstatedOpenwins 64%-67%$0.005Edits photos: not verified+1PP Imageunstatedwins 59%-67%$0.005Edits photos: not verified
Recraft V4.1 Flashunstatedwins 66%-53%$0.007Ideogram 4.0 InstantOpenwins 70%-50%$0.007Edits photos: not verified+1ModelScoreCostPriceWhat changes
Qwen Image 2.1unstatedOpenwins 76%+33%$0.02Memory (4-bit): 2.3 GB → 4.2 GB
Ming Image 0.1 DesignOpenwins 72%+100%$0.03Memory (4-bit): 2.3 GB → 3.6 GBIdeogram 4.0 FastOpenwins 70%-30%$0.011Edits photos: not verified+1Ideogram 4.0 InstantOpenwins 70%-50%$0.007Edits photos: not verified+1FLUX.2 [klein] 9BunstatedOpenwins 63%+13%$0.017Memory (4-bit): 2.3 GB → 5.3 GBModelScoreCostPriceWhat changes
FLUX 3 Imagewins 83%+220%$0.048FLUX.2 [flex]wins 75%+300%$0.06FLUX.2 [max]wins 74%+367%$0.07FLUX.2 [pro]wins 72%+200%$0.045FLUX.2 [dev]unstatedOpenwins 72%+60%$0.024Memory (4-bit): 2.3 GB → 19 GBFLUX.2 [dev] FlashOpenwins 71%-67%$0.005Memory (4-bit): not verifiedFLUX.2 [klein] 9BunstatedOpenwins 63%+13%$0.017Memory (4-bit): 2.3 GB → 5.3 GBFLUX.1 Kontext [max]unstatedwins 63%+433%$0.08All Black Forest Labs models →Run it yourself
estimateFits on✓ 8 GB (phone, laptop) · full quality✓ 16 GB · full quality✓ 24 GB GPU · full quality✓ 48 GB GPU · full quality✓ 80 GB GPU · full quality
LicenceApache-2.0free for commercial use
Benchmarks
in Image Generation & EditingArena Image Editing · overall1,187.5#27
Arena Text-to-Image · overall1,030#37
FAQ
How much does FLUX.2 [klein] 4B cost?›
$0.015 per image.
Is FLUX.2 [klein] 4B free to use?›
There is no free API; it costs $0.015 per image. The weights are open, so you can run it yourself.
How good is FLUX.2 [klein] 4B, and what is it best at?›
#83 of 93 in Image Generation & Editing.
Is FLUX.2 [klein] 4B better than Luma Photon?›
On AA Image Arena · text-to-image v2.1, FLUX.2 [klein] 4B scores 837 vs 843 — about the same. It is 21% cheaper.
When was FLUX.2 [klein] 4B released? Is there a newer version?›
Released 2026-01-15. It is the current version in its line.
Is FLUX.2 [klein] 4B open source?›
Yes, the weights are open (Apache-2.0 licence).
Can I run FLUX.2 [klein] 4B locally?›
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
What is FLUX.2 [klein] 4B?›
FLUX.2 [klein] 4B is an open-weights image generation & editing model from Black Forest Labs, released Jan 2026.
What are the best alternatives to FLUX.2 [klein] 4B?›
Muse Image (cheaper), FLUX.2 [dev] Flash (better), Qwen Image 2.1 (open weights).