The best Large Language Model (LLM) alternative to Codex is Claude Code. It's not free, so if you're looking for a free alternative, you could try Mellum or Xiaomi MiMo Code. If that doesn't suit you, our users have ranked more than 100 alternatives to Codex and 15 are Large Language Model (LLM) Tools so hopefully you can find a suitable replacement. Other interesting Large Language Model (LLM) Tool alternatives to Codex are Rivet AI, Osaurus, OpenPrompt and Pieces for Developers.
Terminal AI assistant features deep codebase awareness, rapid code searches, multi-file edits, and advanced code understanding with explicit approval for changes, integration with VS Code and JetBrains, leverages build tools and test suites, and is highly configurable.
United States
Mellum-4b-base is JetBrains' first open-source large language model (LLM) optimized for code-related tasks.
Czechia
EU
Terminal-native open-source AI coding assistant for Mac, Windows, Linux, and BSD, featuring cross-session memory, reading and writing code, Git management, command execution, built-in MiMo Auto for zero configuration start, and integration with mainstream LLM provider APIs.
China
Visual AI programming platform with a graphical interface for creating, editing, and debugging LLM agent workflows, supporting real-time collaboration, YAML-based version control, open-source TypeScript library integration, and scalable deployment in production environments.
United States
Local AI agents on your Mac. Private, offline, free. Open models run on Apple Silicon; add ChatGPT, Claude or Gemini only when you choose.
United States
Copy Entire Folder to ChatGPT. Hit on Star to BookMark this Page ! Newer Release will be even Better.
Streamlines AI application development by combining plugin and dataset integration, a unified API, visual orchestration, analytics, annotation tools, prompt engineering support, backend-as-a-service capabilities, and compatibility with multiple modern LLMs.
United States
A new family of code large language models (LLMs) designed to advance autonomous software engineering and code intelligence.
Crush is an open-source, terminal-based AI coding agent built in Go by Charm (charmbracelet), designed to bring agentic coding directly into your shell with a polished TUI experience.
A coding-focused perk of the Kimi membership, engineered to drop into any dev workflow, answer faster and more reliably, and get programming tasks done in record time.
China
