openai/codex alternatives

Open-source terminal coding agent; choose it for a community-driven alternative to Codex.

The open source coding agent.

Rust-based terminal coding agent; choose it for a similar CLI experience with community development.

Open-source coding agent for your terminal, built in Rust and on a journey of continuous community improvement. Issues and PRs welcome.

DeepSeek-native terminal agent; choose it if you prefer DeepSeek models and long-running stability.

DeepSeek-native AI coding agent for your terminal. Engineered around prefix-cache stability — leave it running.

Fullscreen TUI coding agent; choose it for a mouse-interactive terminal UI.

SpaceXAI's coding agent harness and TUI. Fullscreen, mouse interactive, extensible.

RAM-efficient coding agent harness; choose it if memory usage is your key constraint.

The most RAM efficient harness

Agent toolkit with a coding agent CLI; choose it if you want a unified toolkit beyond just coding.

AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI

Terminal coding agent for open models; choose it if you use open-weight LLMs like Kimi K3.

A coding agent for open models like Kimi K3

Kimi Code CLI agent; choose it if you want a Kimi-branded terminal agent with Moonshot models.

Kimi Code CLI is your next CLI agent.

Another Kimi Code CLI; choose it for the TypeScript version of Kimi's terminal agent.

Kimi Code CLI — The Starting Point for Next-Gen Agents

Open-source coding agent; choose it for a free alternative with a lightweight terminal experience.

TalkCody - Code is cheap, show me your talk. 🚀 Free Open Source AI Coding Agent.

Minimal zero-config terminal coding agent; choose it for small context footprint and ephemeral subagents.

Stop degrading your model's reasoning. A minimal, zero-config AI coding agent. Enforced ephemeral subagents keep context pure. From tiny local models up to Sol, Fable and Kimi K3.

Lightweight Rust agent with ACP/Claude-Code compatibility; choose it for a 14MB agent that integrates with plugin ecosystems.

14MB ACP-Rust Agent, Claude Code Plugin compatible, Dynamic Workflow, Goal, Artifacts, Free Web Search, full feature and better support!

Open-source terminal coding agent; choose it for a Claude-Code-compatible agent that runs anywhere.

runs anywhere. uses anything

Research-oriented agent harness and multi-agent orchestration; choose it if you need loop engineering rather than a lightweight CLI.

"DeepCode: Open Agentic Coding (Agent Harness & Loop Engineering & Multi-Agent Orchestration)"

Neovim plugin for AI coding; choose it if you want coding assistance inside Vim instead of a standalone terminal agent.

✨ AI Coding, Vim Style

Coding agent as SDK and IDE extension with CLI; choose it if you want agent capabilities embedded in your editor or app.

Autonomous coding agent as an SDK, IDE extension, or CLI assistant.

Open-source coding assistant for IDEs; choose it for editor-integrated chat and code actions instead of a terminal loop.

open-source coding agent

IDE-extension coding agent; choose it if you prefer a GUI in VS Code over terminal.

Kilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with the most popular open source coding agent.

JetBrains AI coding assistant; choose it if you work in JetBrains IDEs.

Sweep: AI coding assistant for JetBrains

Enterprise AI coder with review and completion; choose it for quality gates and team-focused guardrails.

Costrict - strict AI coder for enterprises, quality first, including AI Agent, AI CodeReview, AI Completion.