ChatGPT Alternative GitHub Repositories (2026) · Open Source Tools

grok-cli-self the lightweight, zero-dependency Grok CLI. Chat with xAI's Grok AI (Grok 4) in your terminal: one-shot prompts

Open-source, self-hosted AI platform (PHP/Symfony): chat with any model, RAG over your docs, embeddable widget, MCP — see the cost of every answer. Apache-2.0.

Directory of 34+ free LLM & AI APIs — permanent free tiers, trial credits, and no-card options. GPT-4o, Gemini, Claude, Llama, DeepSeek, Mistral & more. Synced daily from the live directory at free-llm.com.

Daily-updated list of free AI models (free LLM APIs), ranked by quality with live status. Plus one OpenAI-compatible endpoint that routes to the best one.

Self-hosted AI workspace with agents, skills, and tools (Gmail, Calendar) that runs entirely on your own provider API keys (BYOK). Bring your own keys — Groq, OpenRouter, NVIDIA, Hugging Face, Google AI.

A simpler self-hosted alternative to Open WebUI. Bring your own API keys or local models. Native Android and iOS clients.

Open-source, bring-your-own-key (BYOK) multi-model AI chat client for iOS, Android and the web. One LLM client for OpenAI, Anthropic, Google Gemini, OpenRouter, DeepSeek and ten more providers, plus any OpenAI-, Anthropic- or Gemini-compatible endpoint — Ollama, LM Studio, llama.cpp, vLLM. Local-first, self-hostable, no account. AGPL-3.0.