FLUX.2 [klein] 4B
by Black Forest Labs Expected Oct 20, 2026
Coming soonImageopen-weightsimageeditingfastApache-2.0
thairouter/flux-2-klein-4bOverview
Black Forest Labs' small FLUX.2 for sub-second generation and editing. The 4B checkpoint is the Apache-licensed one; the 9B is non-commercial and not offered.
Modality
Image
text / image → image
Licence
Apache-2.0
open weights
Pricing
TBA
per output, announced at launch
Weights
open
black-forest-labs/FLUX.2-klein-4B
Expected Oct 20, 2026. Specs are provisional until the model is actually served; pricing is announced at launch.
Benchmarks
Reference scores published by the model's authors, not measured on ThaiRouter. Live numbers appear once the model is serving.
No published benchmark breakdown yet. Scores appear here as they are released.
API
Served through its own OpenAI-style endpoint, not chat completions.
Planned endpoint
https://api.thairouter.ai/v1/images/generationsSame API key, same credit balance, same no-training and no-storage guarantee as every text model. Request shape follows the OpenAI equivalent so existing SDK calls work; per-output pricing is announced at launch.
Not serving yet. Requests with this id return 404 until launch.