Model Collections
Explore collections of the best AI models, all accessible through a single API. Browse lists of free LLMs, top image generation APIs, the best coding models, and more.
Image Generation Models
Browse and compare top image generation models on OpenRouter. Create images from text prompts using GPT-5 Image from OpenAI, Nano Banana (Gemini) from Google, and other leading image generation models through one unified API.
Free AI Models on OpenRouter
Access powerful AI models at zero cost. Experiment, learn, and build with free AI models and LLMs. OpenRouter is committed to keeping AI accessible for everyone.
AI Models with Tool Calling
Discover AI models that support tool calling and function calling. Build intelligent agents and automated workflows with LLMs that can interact with external tools, APIs, and databases.
Distillable AI Models
Browse AI models that allow distillation and training. Build compliant training datasets and fine-tune smaller, specialized models from these distillable models available on OpenRouter.
Best AI Models for Coding
Compare the best AI models for coding on OpenRouter. Find top LLMs for code generation, debugging, AI coding assistants and agentic coding workflows.
Best AI Models for Roleplay (RP) and Creative Writing
Top AI models for roleplay, RP and character chat on OpenRouter. Compare the best LLMs for Janitor AI, SillyTavern, and creative writing.
AI Models with Vision: Multimodal LLMs for Image Understanding
Compare vision models and multimodal LLMs on OpenRouter. Find AI models that analyze images, read documents, interpret charts and answer questions about visual content through a single API.