AI Agents

Pi

There are many agent harnesses but this one is yours.

A minimal Agent Harness. Built on a lightweight, extensible, customizable core philosophy — it adapts to your workflow, not the other way around. Customize freely via extensions, skills, prompt templates, and themes, packaged as Pi packages and shared via npm or git.

• Minimalist system prompt, extreme token efficiency
• 50+ extension examples — custom workflows, commands, tools, UI
• 15+ model providers, hundreds of models freely switchable
• Tree-structured conversations with branching, backtracking, and sharing
• Four modes: Interactive / Print / RPC / SDK

OpenCode

The open source AI coding agent

An open-source AI coding agent available as a terminal app, desktop app, and IDE extension. Ships with free built-in models and connects to any of 75+ providers including Claude, GPT, and Gemini. Supports LSP auto-loading, parallel sessions, shareable session links, and direct login with GitHub Copilot or ChatGPT Plus accounts.

• 182k GitHub Stars, MIT open source, built in TypeScript
• 75+ LLM providers supported, with built-in free models
• LSP auto-loading gives the LLM precise code context
• Three surfaces: terminal + desktop app + IDE extension
• Direct login with GitHub Copilot / ChatGPT Plus accounts

Codex

Your AI assistant for work.

OpenAI's AI work assistant and coding agent, spanning App, IDE, CLI, and Web. Built-in Git Worktree, Automations, Skills, and Sites deliver deep capabilities for research, briefings, code changes, and automated workflows. Available across ChatGPT Free, Go, Plus, Pro, Business, and Enterprise plans.

• Multi-surface: App (macOS/Windows), IDE, CLI, and Web all sync under one account
• Git Worktree: parallel code changes stay isolated, enabling multi-agent collaboration
• Computer Use: Codex drives macOS GUI, browsers, and native apps
• Sites plugin: build and deploy hosted websites and games directly inside a thread
• 95.4k GitHub Stars, Apache-2.0 open source, built in Rust

Osaurus

Your Mac. Your AI. Free.

A native macOS agent platform. Open-source models run entirely on your Mac, keeping your work data on-device. Tap into ChatGPT, Claude, Gemini or other cloud models when needed — all models share a single memory store. Built natively in Swift, optimized for Apple Silicon.

• Built natively in Swift for a true macOS experience
• Local models run offline, data never leaves the device
• Voice control, folder watching, parallel tasks
• Featured by TechCrunch, 6.6k GitHub Stars
• 162.6k+ downloads, fully open source under MIT

Cline

The Open Coding Agent

An open-source AI coding agent available as an IDE extension, CLI, and SDK. Built around a Plan/Act dual-mode core with MCP tool integration and any-model support (Claude, GPT, Gemini, local Ollama, and more). Inject engineering conventions via .clinerules and embed Cline into Slack, Linear, or GitHub Actions workflows. 8M+ developers use it; Apache-2.0 open source.

• 64.3k GitHub Stars, Apache-2.0 open source, 250+ contributors
• Plan/Act dual-mode: align on strategy first, then execute — approve each step or auto-pilot
• Three surfaces: IDE extension + CLI + SDK, 8M+ installs
• Any-model support: Claude, GPT, Gemini, local Ollama / LM Studio
• .clinerules rule file + MCP tools + Skills for extensibility

TRAE Work

More than Coding

An AI-native workbench from ByteDance's Gravity Slingshot team. Available across web, desktop, and mobile, it offers dual Work and Code modes. Simply state a task — AI breaks it down and orchestrates Skills and tools to execute it, with results ready to review in your Workspace. Covers everything from professional development to everyday office work.

• AI-native workbench: One-tap switch between Work and Code modes, spanning dev workflows to everyday office work
• Three platforms fully available: Web, desktop, and mobile apps sync task progress across devices
• Just state the task: AI decomposes tasks, orchestrates Skills and tools, and surfaces results for review
• Multi-format file handling: Native understanding of JSON, Python, PPTX, CSV and more
• Cloud-native multitasking: Multiple tasks run in parallel on cloud compute, processing in the background