openrouter / image
Black Forest Labs: FLUX.2 Klein 4B
FLUX.2 [klein] 4B is the fastest and most cost-effective model in the FLUX.2 family, optimized for high-throughput use cases while maintaining excellent image quality. Pricing is based on the output...
black-forest-labs/flux.2-klein-4b
Source checked: 2026-09-13 · Provider endpoint, not an independently benchmarked model.
Pricing, with its conditions.
These are source observations, not interchangeable quotes. Token, compute-time, output-duration and per-request prices cannot be compared by the number alone. Input charges and optional features may add to the total.
| Source rate | Billing unit | Conditions | Evidence |
|---|---|---|---|
| 0.014 USD | output_image / megapixel | Black Forest Labs; input and output charges can add together. | Public structured source |
Supported settings from the source
| aspect_ratio | Options: 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9, auto |
|---|---|
| output_format | Options: png, jpeg |
| n | Min: 1 · Max: 1 |
| input_references | Min: 0 · Max: 4 |
| seed | {"type":"boolean"} |
Unlisted settings, region availability, deposits, taxes and commercial terms remain unverified. Confirm the exact endpoint before purchase.