Black Forest Labs' fastest FLUX.2 text-to-image model, a 4B-parameter distilled model for sub-second generation.
LLM Gateway routes requests to the best providers that are able to handle your prompt size and parameters.
Black Forest Labs' fastest FLUX.2 text-to-image model, a 4B-parameter distilled model for sub-second generation. You can access it through LLM Gateway's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.
Pricing for FLUX.2 Klein 4B on LLM Gateway starts at $0.00 per million input tokens and $0.00 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.
FLUX.2 Klein 4B is served by fal through LLM Gateway. Requests are automatically routed to the best available provider, with fallback when a provider has issues.
No. FLUX.2 Klein 4B does not currently support tool calling or structured JSON outputs through LLM Gateway.
FLUX.2 Klein 4B was released on January 15, 2026.