# Feima (飞码) > Feima is a VS Code extension that integrates alternative AI models (Qwen3, DeepSeek V4, GLM-5, MiniMax M2.5, Kimi K2.5, and more) into GitHub Copilot Chat. Pay-per-use billing with no monthly commitment. Works as a drop-in addition to Copilot — keep your Copilot subscription, add cost-effective Chinese models. ## Core Pages - [Home](https://feimacode.com/): Product overview, supported models, and demo - [Download & Setup](https://feimacode.com/download): VS Code extension installation guide - [Pricing](https://feimacode.com/pricing): Free tier, Starter, and Pro plans with pay-per-use billing - [Copilot Alternative](https://feimacode.com/copilot-alternative): Feature comparison between Feima models and GitHub Copilot's default models - [Promotion](https://feimacode.com/promotion): Referral program and starter credits - [API Keys](https://feimacode.com/use-api-keys): Using Feima as a standalone API (OpenAI-compatible endpoints) ## Documentation - [Feima Docs](https://docs.feimacode.com/): Full documentation — installation, authentication, configuration, API reference, FAQ - [Docs (中文)](https://docs.feimacode.com/zh/): 飞码完整中文文档 ## Key Facts - **Supported models**: Qwen3, DeepSeek V4, GLM-5, MiniMax M2.5, Kimi K2.5, and more across multiple Chinese AI providers - **Thinking models**: Chain-of-thought reasoning support for complex problems - **Billing**: Pay-per-use — only pay for requests you make, no monthly subscription required - **Platform**: VS Code extension on the VS Code Marketplace - **Authentication**: OAuth2 with PKCE — sign in with your Feimacode account - **API**: OpenAI-compatible REST API (api.feimacode.com) for programmatic access - **Domains**: feimacode.com (website), docs.feimacode.com (documentation), auth.feimacode.com (identity), api.feimacode.com (API gateway) ## Company Pages - [Terms of Service](https://feimacode.com/terms) - [Privacy Policy](https://feimacode.com/privacy) - [Blog](https://feimacode.com/blog)