Best OpenCode Alternative
OpenCode alternatives come up when you want a vendor's own agent, such as Claude Code or Codex, a GUI workspace for many sessions, or parallel runs with worktree and container isolation.
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What to look for in a OpenCode alternative
- A vendor-built agent tuned to its own models
- A workspace UI for many sessions
- Side-by-side comparisons across agents
Recommended options
Agentastic
Our pickNative macOS workspace with 55 built-in agent definitions and a git worktree or container per task. Built-in editor, browser, diff viewer, and AI code review.
Claude Code
Anthropic's coding agent for the terminal, IDEs, a desktop app, and the web, with built-in worktree support for parallel sessions.
Codex
OpenAI's open-source coding agent for the terminal, also available in the ChatGPT desktop app. Run it standalone or alongside Claude Code in Agentastic.
Gemini CLI
Google's open-source (Apache-2.0) agent that brings Gemini models into your terminal.
How to switch from OpenCode cleanly
Run OpenCode in Agentastic alongside Claude Code, Codex, and Gemini CLI, each in its own worktree, for a direct comparison.
Common questions
Does Agentastic support OpenCode?
Yes. OpenCode is one of Agentastic's 55 built-in agent definitions, and it can run in a terminal or as a structured chat.
Claude Code vs OpenCode: what is the difference?
Claude Code is Anthropic's agent for its own models. OpenCode is an open-source (MIT) agent that works with 75-plus model providers, including local models. Agentastic runs both side by side.
Does Agentastic require an account?
No. The app runs locally and you sign in directly with your model providers. An Agentastic account is only needed for optional services such as the phone relay and link sharing.