OpenCode

Open-source terminal-native AI coding agent from SST (github.com/sst/opencode). Direct competitor to claude-code and Gemini CLI with three key differentiators: native themable terminal UI, parallel multi-agent on the same project, and 75+ LLM provider support via routers.

Disambiguation: there was an earlier “OpenCode” project that’s been abandoned. This is the newer SST project — more polished, actively developed.

Key features

• Native themable terminal UI (vs plain text)
• Parallel multi-agents on the same project
• Shareable session links for collaboration
• 75+ LLM providers via routers — Anthropic, OpenAI, Gemini, OpenRouter, Azure, Bedrock, Deepseek, ollama, LM Studio, etc.
• LSP-aware code accuracy
• MCP support — configurable in opencode.json

Free paths

• Google Gemini 2.5 Pro free tier via AI Studio key
• OpenRouter free DeepSeek tiers
• Local: Ollama / LM Studio

Install

npm install -g opencode
opencode             # start in current dir
opencode --cwd path  # scope to project

Sources

• WorldofAI OpenCode walkthrough

See Also

• claude-code — primary competitor
• cline, void-ide — sibling open-source agentic coders
• continue — IDE-extension competitor