Vibe Claude Code
Anthropic's agent for the terminal, IDE and desktop that reads, edits and runs code in your repo.
Agent harnesses
25 harnesses: the runtime and agent loop behind a coding agent, plus the frameworks you can build your own on. For products and pricing by category, see the Agent Toolbox.
Coding agents
| Harness | Maker | Licence | GitHub ★ | MCP | Subagents | Headless | Sandboxing |
|---|---|---|---|---|---|---|---|
| Claude Code | Anthropic | proprietary | 151,499 | Yes | Yes | Yes | Yes |
| OpenAI Codex CLI | OpenAI | Apache-2.0 | 129,621 | Yes | Yes | Yes | Yes |
| Gemini CLI | Apache-2.0 | 107,416 | Yes | Yes | Yes | Yes | |
| OpenCode | Anomaly (formerly SST; repo anomalyco/opencode) | MIT | 214,864 | Yes | Yes | Yes | — |
| goose | Block (repo now under aaif-goose org) | Apache-2.0 | 55,362 | Yes | Yes | Yes | Yes |
| Aider | Aider-AI (Paul Gauthier) | Apache-2.0 | 49,593 | — | — | Yes | — |
| Cline | Cline Bot Inc. | Apache-2.0 | 70,458 | Yes | Yes | Yes | — |
| Roo CodeArchived | Roo Code Inc. | Apache-2.0 | 24,272 | Yes | — | — | — |
| Kilo Code | Kilo Code (Kilo-Org) | MIT | 27,638 | Yes | — | Yes | Yes |
| OpenHands | OpenHands (All Hands AI) | MIT | 91,121 | Yes | Yes | Yes | Yes |
| Crush | Charm | FSL-1.1-MIT | 28,684 | Yes | — | — | — |
| Amp | Amp (formerly Sourcegraph) | — | — | Yes | Yes | Yes | — |
| Cursor CLI | Cursor | — | — | Yes | — | Yes | Yes |
| Warp | Warp | Partly open | 65,490 | Yes | Yes | Yes | — |
| Qwen Code | Alibaba Qwen team | Apache-2.0 | 28,539 | Yes | Yes | Yes | Yes |
| PlandexInactive | Plandex | MIT | 15,759 | — | — | — | — |
| Pi | Earendil (Mario Zechner, badlogic) | MIT | 115,920 | Yes | No | Yes | — |
| Grok Build | SpaceXAI (xAI) | Apache-2.0 | 27,429 | Yes | Yes | Yes | Yes |
| Hermes Agent | Nous Research | MIT | 254,611 | Yes | Yes | Yes | Yes |
| Muse Code | Meta | — | — | Yes | Yes | Yes | Yes |
OpenAI Codex CLI
OpenAI's open-source terminal coding agent, also available as IDE extension and cloud agent.
Gemini CLI
Google's open-source terminal agent built around Gemini models.
OpenCode
Open-source coding agent for terminal, desktop and IDE that works with 75+ model providers.
goose
Open-source on-machine agent extended through MCP servers.
Aider
Terminal pair programmer that maps your repo and commits each change to git.
Cline
Open-source VS Code agent (plus CLI) that plans, edits and runs commands with approval.
Roo Code
Open-source VS Code agent with role-based modes; makers now focus on Roomote cloud agent.
Kilo Code
Open-source coding agent for VS Code, JetBrains and CLI with a gateway to 500+ models.
OpenHands
Open-source autonomous SWE agent with web GUI, CLI and SDK.
Crush
Charm's terminal coding agent with a polished TUI.
Amp
Coding agent with remote 'orbs' where agents keep working in the cloud.
Cursor CLI
Terminal version of the Cursor agent for scripts and headless runs.
Warp
Agentic development environment built around the terminal.
Qwen Code
Open-source terminal agent tuned for Qwen coder models.
Plandex
Open-source terminal agent for large multi-file tasks with a diff review sandbox.
Pi
Minimal toolkit: unified LLM API, agent loop, TUI and a coding-agent CLI.
Grok Build
xAI's terminal coding agent (the grok CLI): a full-screen TUI that also runs headless and over the Agent Client Protocol.
Hermes Agent
Nous Research's self-improving terminal agent for coding and other tasks, with persistent memory, agent-made skills and a messaging gateway.
Muse Code
Meta's terminal and CI coding agent (the muse CLI), built for Muse Spark, with subagents in isolated worktrees and a replayable event log.
Frameworks
| Harness | Maker | Licence | GitHub ★ | MCP | Subagents | Headless | Sandboxing |
|---|---|---|---|---|---|---|---|
| Claude Agent SDK | Anthropic | MIT | 8,293 | Yes | Yes | — | — |
| OpenAI Agents SDK | OpenAI | MIT | 30,100 | Yes | Yes | — | Yes |
| smolagents | Hugging Face | Apache-2.0 | 29,894 | Yes | Yes | — | Yes |
| Mastra | Mastra | Apache-2.0 | 28,865 | Yes | Yes | — | Yes |
| LangGraph | LangChain | MIT | 43,402 | — | — | — | — |
Claude Agent SDK
SDK that exposes Claude Code's agent loop and tools for building your own agents.
OpenAI Agents SDK
Lightweight framework for multi-agent workflows with handoffs, guardrails and tracing.
smolagents
Small Python library for agents that act by writing and running code.
Mastra
TypeScript framework for agents, workflows, memory and evals, with a hosted platform.
LangGraph
Low-level framework for stateful, graph-based agent orchestration.
GitHub stars are as of the date on each page. Feature columns: Yes or No only where the official docs say so; — means not stated or not verified. Every value comes from the official site or docs, or from the GitHub API, on the date shown. A blank (—) means the value isn't stated or wasn't verified. It never means 'no'. Pricing is copied from official pages and changes often. No affiliate links.