The visual prompt IDE

Design workflows, compare models, and optimize in one canvas.

Tokn interface

Powerful features

Visual Flow Editor

Drag-and-drop node-based canvas with real-time execution. Build complex multi-step LLM workflows visually.

Multi-Provider Support

Work seamlessly with OpenAI, Claude, and Gemini. Compare models and switch providers effortlessly.

Tool Calling System

Define custom JavaScript tools with schemas. Sandboxed execution in Web Workers for security.

Built for developers

01

Iterative Refinement

Test and refine prompts visually with immediate feedback. See how changes affect your outputs in real-time.

02

Model Comparison

Compare outputs across models and hyperparameters side-by-side. See how different settings change results.

03

Automated Optimization

Let algorithms improve your prompts. Use DSPy MIPROv2 and MLflow GEPA for automatic optimization.