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Open-source AI coding agent for the terminal

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Open-source terminal-based AI coding agent built in Go by the SST team, with a rich TUI (Bubble Tea) supporting 75+ model providers including OpenAI, Anthropic, Gemini, Bedrock, Groq, and OpenRouter. Features vim-like editing, persistent SQLite sessions, and LSP integration for 40+ languages. Fully free with no vendor lock-in, it has rapidly grown to 95k+ GitHub stars.

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OpenCode is an open-source, terminal-based AI coding agent built in Go that provides a rich TUI for interacting with AI models to perform code generation, debugging, refactoring, and development automation, created by the team at SST and released in late 2025. It solves the problem of vendor lock-in in AI coding tools by supporting over 75 model providers including OpenAI, Anthropic, Google Gemini, AWS Bedrock, Groq, Azure OpenAI, and OpenRouter, all through a single free tool with no subscription fees. OpenCode has rapidly gained over 95,000 GitHub stars, becoming one of the most popular open-source AI coding agents.

OpenCode offers an interactive TUI built with Bubble Tea, vim-like editing capabilities, persistent SQLite storage for session management, and Language Server Protocol integration supporting 40+ built-in LSP servers for TypeScript, Python, Go, Rust, Java, and more. The tool allows AI to execute commands, modify files, and reason about code structure with full project context, while developers maintain control through review and approval workflows. Unlike subscription-based competitors, OpenCode lets developers bring their own API keys or run local models through Ollama at zero API cost.

OpenCode targets developers who want a powerful, free, and open-source alternative to proprietary AI coding agents like Claude Code, with the flexibility to choose any AI model provider based on performance, cost, or privacy requirements. It is particularly popular among developers who prefer terminal-based workflows, those running local models for offline or air-gapped development, and cost-conscious teams who want enterprise-grade AI coding assistance without monthly subscriptions. OpenCode's MIT license and active community make it a practical foundation for customization and extension.

Pricing

Free (bring your own API key)

Platforms

macOS, Linux, Windows, Desktop app

Categories

Terminal & CLI ToolsAI CLI AgentsAI Coding Assistants

Tags

Open SourceMulti-ModelCLI AgentPrivacy-FocusedBYOKLSPOllamaAgentic

Use Cases

Terminal AgentsCode GenerationRefactoringLocal AI WorkflowsAgentic DevelopmentAI-Powered Debugging

Alternatives

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Codex

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OpenAI coding agent for app, editor, terminal, and cloud work

Codex is OpenAI's coding agent for software development across the Codex app, editor, terminal, and cloud tasks. It helps write, review, debug, refactor, and automate code, with ChatGPT plan access for managed surfaces and API-key usage for CLI, SDK, and IDE workflows. The open-source CLI and SDK support local repository work, while cloud features add GitHub review, Slack/Linear integrations, worktrees, skills, MCP, and automations.

freemiumOpen Source
goose ai

Goose

Open-source extensible AI agent by Block

Autonomous coding agent from Block (Square) that works with any LLM through MCP-first extensibility. Apache 2.0 licensed with 47K+ GitHub stars and a Linux Foundation AAIF founding project. Designed for terminal-based workflows with deep tool integration, making it a strong open-source option for developers who want agent-assisted coding without vendor lock-in.

open-sourceOpen Source

Serena

LSP-powered semantic coding agent via MCP

Serena is a free, open-source coding agent toolkit that provides IDE-like semantic code retrieval and editing capabilities to any LLM via the Model Context Protocol (MCP). Built on Language Server Protocol (LSP) integration, it enables symbol-level navigation, cross-file refactoring, and relational code understanding across Python, TypeScript, Go, Rust, Java, PHP, and more — without requiring file-level reads or text-based search.

open-sourceOpen Source

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Comparisons

OpenCode vs Qwen Code — Model-Agnostic Control vs Qwen-Native Agent Workflow

OpenCode and Qwen Code are both open-source terminal coding agents, but they optimize for different decisions. OpenCode is the stronger default when you want provider choice, local/BYOK flexibility, and a mature multi-model terminal workflow. Qwen Code is compelling when your team wants a Qwen3-Coder-optimized agent with a generous free request story and an Alibaba-aligned model path.

OpenCodeQwen Code

OpenCode vs Codex: Open Provider Choice or OpenAI’s Coding Agent Stack?

OpenCode and Codex are both terminal-first coding agents, but the trade-off is openness and provider choice versus OpenAI’s integrated Codex stack. OpenCode lets teams bring many LLM providers and local models through configuration; Codex pairs a Rust CLI with ChatGPT plans, OpenAI models, sandboxing, and cloud/IDE options. Choose based on model control, billing, and enterprise workflow fit.

OpenCodeCodex

Hermes Agent vs OpenCode: Coding Agent or Persistent AI Workflow Agent?

OpenCode and Hermes Agent both appeal to developers who want open, tool-using AI agents, but they optimize for different jobs. OpenCode is a focused terminal-first coding agent. Hermes Agent is broader: a persistent workflow agent with memory, reusable skills, scheduled jobs, messaging gateways, and multi-system automation for work that extends beyond the repository.

Hermes AgentOpenCode

OpenCode vs Aider — Open-Source Terminal AI Coding Agents Compared

OpenCode and Aider are both open-source terminal-native AI coding agents, but they take very different approaches. OpenCode emphasizes a plan-first methodology with 75+ model integrations and parallel sessions across 95K+ stars. Aider focuses on deep Git integration where every edit is a commit and every session is a branch, with 39K+ stars and 4.1 million installs processing 15 billion tokens weekly.

OpenCodeAider

Claude Code vs OpenCode — Terminal-Native AI Coding Agents for Developers Compared

Claude Code and OpenCode are two terminal-native AI coding agents that give developers agentic capabilities directly from the command line. Claude Code, built by Anthropic, leverages Claude's deep reasoning with full system access and a $20-100/month subscription. OpenCode is an open-source MIT-licensed alternative with 95K+ GitHub stars, a plan-first methodology, and 75+ LLM provider integrations at zero platform cost.

Claude CodeOpenCode