Mellum-4b-base is JetBrains' first open-source large language model (LLM) optimized for code-related tasks.

Mellum is the most popular Self-Hosted alternative to Claude Code.
- Mellum is Free and Open Source
The best Large Language Model (LLM) alternative to Claude Code is Mellum, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Claude Code and seven of them are Large Language Model (LLM) Tools so hopefully you can find a suitable replacement. Other interesting Large Language Model (LLM) Tool alternatives to Claude Code are Rivet AI, Dify - LLMOps Platform, Pieces for Developers and OpenPrompt.
Mellum-4b-base is JetBrains' first open-source large language model (LLM) optimized for code-related tasks.

Mellum is the most popular Self-Hosted alternative to Claude Code.
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.

One API for plugins and datasets, one interface for prompt engineering and visual operation, all for creating powerful AI applications.




Your Personalized AI Development Assistant and Workflow Copilot.




Copy Entire Folder to ChatGPT. Hit on Star to BookMark this Page ! Newer Release will be even Better.

Qwen Code is an AI-powered command-line workflow tool designed for developers, adapted from Gemini CLI and optimized for Qwen3-Coder models.


A new family of code large language models (LLMs) designed to advance autonomous software engineering and code intelligence.