Codex CLI vs OpenCode

Codex CLI vs OpenCode
Fact	Codex CLI	OpenCode
Language	Rust	TypeScript
Licence	Apache-2.0	MIT
Stars	128k	212k
Latest	rust-v0.160.1	v1.18.34
Last push	2026-10-06	2026-10-06
Release cadence	too few releases	about 6 days between releases
Active contributors	91+ commit authors on the default branch in the last 90 days	52+ commit authors on the default branch in the last 90 days
Flags	none	none

How they relate

Both replace Claude Code. Alternatives to Claude Code →
Full replacementCodex CLIOpenAI's terminal agent, open source and built around OpenAI models.
Full replacementOpenCodeTerminal agent that works with Anthropic, OpenAI and Google models or a local one.
Both replace GitHub Copilot. Alternatives to GitHub Copilot →
PartialCodex CLIAn agent that works on the whole repository, without completions as you type.
PartialOpenCodeAn agent that works on the whole repository, without completions as you type.

v1.18.342026-09-30Send namespaced session and parent-session identity headers with model requests.
v1.18.332026-09-28Cloudflare AI Gateway models now honor provider response and stream timeouts. (@danlapid)
v1.18.322026-09-21Fixed Bedrock image attachments so they are only hoisted for Claude, Nova, and Llama 4 models.
v1.18.312026-09-14Restored ACP session model, effort, mode, and reasoning chunk boundaries when loading, resuming, or forking sessions. (…
v1.18.302026-09-09Added the Astra system prompt for GPT-6 models.

unsigned The latest release, rust-v0.160.1, carries no signature GitHub could verify.

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unsigned The latest release, v1.18.34, carries no signature GitHub could verify.

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