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View detailsJetBrains Mellum
JetBrains' open code completion model that powers fast, focused suggestions for developers in JetBrains IDEs.
JetBrains Mellum is JetBrains' open code completion model, released under the Apache 2.0 licence. It is a model trained specifically for code completion, designed to give fast, focused suggestions as you type, and it powers the completion features in JetBrains IDEs.
Key Features
- Open code completion model under Apache 2.0
- Fast, focused suggestions as you type
- Powers completion in JetBrains IDEs
- Free to download and run yourself
- Trained specifically for code, not general chat
- Useful base for building your own tools
Pricing
| Plan | Price | Details |
|---|---|---|
| Free | $0 | Free and open under the Apache 2.0 licence; run it on your own hardware. |
Prices as listed in 2026 research. Always check the official site for the latest price — plans change. Free plan: Yes — it has a free plan.
Best for: developers and teams who want a free, open code completion model they can run and study themselves.
Popular with: Developers, Students
Popular with: Developers, Students
How it works
Because Mellum is open, developers and researchers can download it, run it on their own hardware, and study how it works. It is a useful building block for anyone creating their own coding tools, and it shows what a specialised completion model can do compared with a general-purpose chatbot.
Mellum itself is free to use under its open licence. You do not pay JetBrains for the model; your only costs are the hardware or hosting you run it on. It suits developers who want control over their completion engine, and researchers studying code models.
Pros and Cons
✓ Pros
- Free and open under a permissive licence
- Specialised for code completion, so suggestions are focused
- You control where it runs
- Good base for research and custom tools
✗ Cons
- A model, not a finished assistant product
- Needs an IDE integration or host to be useful
- Completion-only, so no agent or chat features built in
Frequently Asked Questions
Is JetBrains Mellum free?
Yes — JetBrains Mellum has a free plan. Free open model
What is JetBrains Mellum best for?
developers and teams who want a free, open code completion model they can run and study themselves.
What kind of tool is JetBrains Mellum?
JetBrains Mellum is a Coding Assistants tool on VerlumoAI.
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View detailsLast reviewed: November 2026