OpenCode is an open-source coding agent with free models through OpenCode Zen, including DeepSeek V4.1 Flash and the anonymous Space Bunny preview with a 1M context window.

Muse Code is Meta's terminal coding agent, built by Meta Superintelligence Labs, running on the Muse Wonder models with monthly plans from $5 or pay-per-token pricing.

T3 Code is an open-source (MIT) control plane for coding agents from the t3.gg team, orchestrating Claude Code, Codex, Antigravity, OpenCode, Cursor, and Grok from one surface with your own subscriptions.