FLUX.2 [klein] 9B

Text-to-image generation with FLUX.2 [klein] 9B from Black Forest Labs. Enhanced realism, crisper text generation, and native editing capabilities.

By Black Forest Labs

Pricing: $0.006 per megapixel

Overview

FLUX.2 [klein] 9B is a 9-billion parameter image generation model from Black Forest Labs. Distilled to just 4 inference steps for sub-second generation. Uses an 8B Qwen3 text embedder and supports up to 4 megapixel output resolution.

Key Features

• **Sub-second inference** — distilled to 4 steps
• **Higher quality than 4B** — 9B parameters for richer detail and diversity
• **Text rendering** — strong text-in-image capabilities from FLUX.2
• **Up to 4MP resolution** — dimensions must be multiples of 16

When to Use

Choose the 9B variant over 4B when output quality and diversity matter more than speed. Note: this model uses the FLUX Non-Commercial License.

Examples

• A neon-lit Tokyo alleyway at night with a vending machine glowing amber, steam rising from grates, wet reflections on asphalt, cinematic
• A neon sign reading 'OPEN LATE' hanging in the rain-streaked window of a Tokyo ramen shop at 2am, steam rising from inside, warm amber glow against the blue night, wet cobblestones reflecting the sign, a single red paper lantern, shot on 35mm film with grain

Frequently asked questions

What is FLUX.2 [klein] 9B?

Text-to-image generation with FLUX.2 [klein] 9B from Black Forest Labs. Enhanced realism, crisper text generation, and native editing capabilities.

What license does FLUX.2 [klein] 9B use?

FLUX Non-Commercial License. The 9B variant is for non-commercial use only.

Related models

• FLUX.2 [klein] 9B — Edit, Image-to-image editing with FLUX.2 [klein] 9B from Black Forest Labs. Precise modifications using natural language descriptions and hex color control.
• FLUX 1.1 [pro] Ultra, Ultra-resolution variant of FLUX 1.1 [pro] with 4MP+ outputs and richer detail. Drop-in upgrade when the standard FLUX 1.1 [pro] resolution is the bottleneck.
• FLUX 1.1 [pro], Black Forest Labs' production-grade FLUX 1.1. State-of-the-art prompt adherence and photoreal quality at competitive per-image pricing.
• SDXL-Lightning, ByteDance lightning-fast SDXL distillation. 4-step text-to-image at near-real-time latency.

Discoverable surfaces

• Dispatch endpoint: POST https://api.runflow.io/v1/models/flux-2-klein-9b/runs
• Per-model spec (markdown): https://app.runflow.io/models/flux-2-klein-9b/llms.txt
• Docs page: https://docs.runflow.io/models/flux-2-klein-9b
• Public OpenAPI spec: https://docs.runflow.io/api/openapi.public.json
• Agent skill (start here): https://www.runflow.io/.well-known/agent-skills/runflow/SKILL.md