FLUX.2 Klein 4B by OpenRouter — Specs, Pricing & Capabilities | whichllm

Model ID black-forest-labs/flux.2-klein-4b

Provider OpenRouter

Family flux

Status -

Knowledge Cutoff 2025-06

Release Date 2026-01-14

Input Modalities image, text

Output Modalities image

Context Window 40960

Input Limit -

Output Limit 40960

Tool Calling No

Reasoning No

Structured Output -

Temperature Control Yes

Open Weights Yes

Input Cost / 1M tokens -

Output Cost / 1M tokens -

Reasoning Cost / 1M tokens -

Cache Read Cost / 1M tokens -

Cache Write Cost / 1M tokens -