Mellum 4B
Last refreshed 2026-06-01. Next refresh: weekly.
Mellum 4B has model metadata, but missing tracked provider pricing keeps it from being a default production pick.
Decision context: Coding task fit, 0 tracked provider routes, and research from 2026-06-01.
Use it for
- Teams evaluating coding
- Workloads that can use a 8k context window
Do not use it for
- Cost-sensitive launches that need sourced token pricing
- Vision or document-understanding workloads
- Strict JSON or tool-calling flows
Cheapest output
-
No tracked output price
Provider routes
0
No provider route in seed
Quality / dollar
Unknown
No task benchmark coverage yet
Freshness
2026-06-01
Researched today
Top use-case fit
Coding
Included by capability and metadata signals in the decision map.
Provider price ladder
No tracked provider token pricing is available for this model yet.
Benchmark peer barsfor Coding
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
About
Mellum 4B is JetBrains' open-weights LLaMA-style code-completion model trained on roughly 4.2T tokens across permissively licensed code and Wikipedia. It is optimized for IDE code suggestions and local or self-hosted developer tooling.
Mellum 4B has a 8k-token context window.
Capabilities
No model capability flags are currently sourced.