Flux 2 Klein Base 9B Text to Image API

WaveSpeed AI FLUX.2 Klein Base 9B Text-to-Image

WaveSpeed AI FLUX.2 Klein Base 9B Text-to-Image generates images from natural-language prompts with a simple interface for prompt input, output size selection, and optional seed control. It is suitable for concept art, creative ideation, marketing visuals, and other prompt-driven image generation workflows.

Why Choose This?

• Prompt-based image generation Turn natural-language descriptions into generated images with minimal setup.

• Simple control surface Only a few core inputs are required, making the workflow easy to use and integrate.

• Flexible image size Use the size parameter to control the output dimensions.

• Seed support for reproducibility Use seed to get more consistent generations across repeated runs.

• Production-ready API Suitable for image generation tools, prototyping pipelines, and creative applications.

Parameters

How to Use

1. Write your prompt — describe the subject, style, lighting, composition, and mood you want.
2. Choose size (optional) — set the output dimensions if you want something other than the default.
3. Set a seed (optional) — use a fixed seed for more reproducible results, or -1 for random generation.
4. Submit — run the model and download the generated image.

Example Prompt

A cinematic futuristic city street at night, neon reflections on wet pavement, atmospheric fog, ultra-detailed, dramatic lighting

Pricing

Just $0.01 per image.

Billing Rules

• Each generated image costs $0.01
• size and seed do not affect pricing
• Pricing is fixed per generated image

Best Use Cases

• Concept art — Explore visual ideas and creative directions quickly.
• Marketing creatives — Generate visuals for campaigns, ads, and presentations.
• Social media content — Produce prompt-driven images for posts and promotional content.
• Creative prototyping — Test visual ideas before moving into heavier production workflows.
• General image generation — Create still images from short or detailed prompts.

Pro Tips

• Be specific in your prompt about subject, environment, style, and lighting.
• Start with the default size for quick generation, then adjust if needed.
• Use the same seed when you want more consistent variations of a concept.
• Use -1 when you want a fresh random result each time.
• Short, focused prompts often produce more controllable results than overly broad descriptions.

Notes

• prompt is required.
• size defaults to 1024*1024.
• seed defaults to -1, which means random generation.
• Pricing is fixed at $0.01 per image.

Related Models

• FLUX.2 Klein Base 9B Text-to-Image LoRA — With LoRA support for custom styles.
• FLUX.2 Klein 4B Text-to-Image — Lighter 4B version at lower cost.
• FLUX.2 Klein Base 9B Edit — Image editing model.
• FLUX.2 Pro — Flagship-quality text-to-image generation.