black-forest-labsCatalog Onlyfree endpoint
flux.2-klein-4b
black-forest-labs/flux_2-klein-4b
FLUX.2-klein-4B is a distilled image generation and editing model, producing outputs at lighting speed
Context Length
Not published
Input Pricing
$0.18 / 1M
Output Pricing
$0.18 / 1M
Recent Latency
No probes
Model Architecture & Limits
Canonical IDblack-forest-labs/flux_2-klein-4b
Publisher / Originatorblack-forest-labs
Model FamilyCosmos
ArchitectureDiffusion Transformer (DiT)
Context Window LimitNot published
Max Output TokensNot published
Endpoint Protocolnim-custom
Capabilities & Modal Surfaces
Chat Conversation✕ No
Tool / Function Calling✕ No
Reasoning / Thinking✕ No
Structured Output (JSON)✕ No
Vision / Multimodal✓ Yes
Audio Processing✕ No
License & Restrictions
NVIDIA API Trial Terms of Service
Commercial and research use permitted under governing model and API terms.