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

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 nine 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, Osaurus, Dify - LLMOps Platform and Pieces for Developers.
Mellum-4b-base is JetBrains' first open-source large language model (LLM) optimized for code-related tasks.

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.

AI edge infrastructure for macOS. Run local or cloud models, share tools across apps via MCP, and power AI workflows with a native, always-on runtime.

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








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


Ollie is a sovereign creative suite designed for developers, writers, and creators who want the power of AI without sacrificing privacy or paying monthly subscriptions. It is a unified engine that runs local AI models entirely offline on your own hardware, ensuring complete data...



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