Flux Kontext Dev
$0.02/img
Developer-ready API access
Pricing
Kontex Dev offers competitive pricing at just $0.02 per successful image generation. Multiple variants will be offered to suit different speed and quality requirements.
Core Features
Open weights, ultra-fast inference, and multi-framework support designed for developers
Open Weights
Fully open-source model weights hosted on HuggingFace for research and custom deployment. Model weights freely available under Non-Commercial License.
Ultra-Fast Inference
Optimized model supports rapid response, suitable for local deployment, experimental platforms, and batch processing workflows.
Framework Compatibility
Supports mainstream inference platforms including HuggingFace Diffusers, ComfyUI, and TensorRT. Works out of the box on local or cloud-based pipelines.
Benchmark-Proven Performance
Outperforms multiple closed-source and open-source image editing models in our KontextBench evaluation (including Gemini Flash, Bagel, etc.).
NVIDIA Optimized
Provides TensorRT weights optimized for NVIDIA Blackwell architecture (BF16 / FP8 / FP4), balancing speed and efficiency.
Production-Ready API
Kontext Dev model is deployed on our platform. No local deployment needed - register and start using immediately. Supports batch calls and low-latency responses for all development scenarios. No setup needed — just call the API.
Credits-Based Billing
Users can directly call the model API by purchasing credits. Simple, transparent pricing with no licensing negotiations required. Suitable for individual developers to enterprise applications. Pay only for what you use — flexible and scalable.
Commercial Licensing Ready
Self-service licensing portal available for enterprises to quickly purchase commercial licenses and integrate into products and services.
Real-time Webhooks
Instant notifications upon asynchronous processing completion. No polling required, improving application response efficiency.
Low Latency Response
Optimized inference engine ensures rapid response times, suitable for real-time application scenarios.
Get started
Create your API key
Sign up and grab an API key from the PiAPI workspace — free credits are included on sign-up.
Top up credits
Add credits on the billing page when you are ready to scale beyond the free tier.
Call the API
POST your first task following the API docs, then poll the task until the result is ready.
Iterate with the API
Use the API docs and the request example above to iterate on prompts and settings before wiring them into your product.
Frequently asked questions
What is Flux Kontext API?
Flux Kontext API is a powerful image-to-image editing service that allows you to transform images using natural language prompts. It offers multiple model variants (Pro, Max, and Dev) with different speed and quality trade-offs. The API supports various editing tasks including style transfer, object modification, background replacement, text editing, and more. Built by Black Forest Labs, it provides production-ready AI image editing capabilities through simple REST API calls.
Can I use Flux Kontext for commercial projects?
Yes! All Kontext models come with full commercial use rights. You can integrate them into your products, services, and client work without any additional licensing fees or restrictions.
How do webhooks work?
When you submit an image editing request, you can provide a webhook URL. Once processing is complete, we'll send a POST request to your endpoint with the results. This allows for seamless integration into your applications without polling for status updates.
What image formats are supported?
Kontext supports common image formats including JPEG, PNG, and WebP. Input images should be under 10MB for optimal performance. Output format matches your input format by default, but can be specified in your API request.
Is there a rate limit?
Rate limits depend on your plan and usage patterns. Free tier users have lower limits, while paid users get higher throughput. For high-volume applications, contact us about enterprise plans with custom rate limits and dedicated infrastructure.
What happens if my API call fails?
Failed API calls are not charged. We provide detailed error messages to help you troubleshoot issues. Common failures include invalid image formats, oversized files, or inappropriate content. Our status page shows real-time API health.
Do you offer API documentation and code examples?
Yes! We provide comprehensive API documentation with detailed examples in multiple programming languages including Python, Node.js, PHP, and cURL. Our interactive API explorer lets you test endpoints directly in your browser with real-time examples and response previews.
More questions? See the API docs.