FLUX.2 Klein 4B

black-forest-labs/flux-2-klein-4b

Maker: Black Forest Labs, Germany
Released: 2026-01-14
Knowledge cutoff: 2025-06
Family: flux
Weights: open
Tasks: image.generate, image.edit

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Offerings

Provider	Model id at the provider	Status	Price per 1M tokens	Per-unit prices	Limits	Capabilities (level)
NVIDIA API Catalog	`black-forest-labs/flux_2-klein-4b`	ga	Input: unknown Output: unknown	none	Context: unknown Max output: unknown	`input.text` claimed `input.image` claimed `input.pdf` claimed `output.image` claimed
OpenRouter	`black-forest-labs/flux.2-klein-4b`	ga	Input: $0 Output: $0 Image output tokens: $3.41796875 Since 2026-11-04	none	Context: 40,960 tokens Max output: 36,864 tokens	`input.text` claimed `input.image` claimed `output.image` claimed

Quality scores

No quality score for this model yet.

Aliases

Other names the API accepts for this model.

black-forest-labs/flux.2-klein-4b
black-forest-labs/flux_2-klein-4b

Use it from the API

Look this model up, or ask for the best model for its task on the providers that offer it. See the quickstart and the API reference.

Look up this model

curl 'https://rhumbdata.com/v1/models/black-forest-labs/flux-2-klein-4b' \
  -H "Authorization: Bearer $RHUMB_KEY"

Resolve image.generate on its providers

curl 'https://rhumbdata.com/v1/resolve?task=image.generate&providers=nvidia,openrouter' \
  -H "Authorization: Bearer $RHUMB_KEY"

Built from catalog version 2026-11-04.13 of 2026-11-04. Prices are list prices per 1M tokens unless marked otherwise; every score shows its source's notice (see Attributions).