ThursdAI — the weekly AI news podcast hosted by Alex Volkov — has covered 2 JetBrains releases since May 2025, most recently Mellum 2 on Jun 4, 2026. Highlights include Mellum-4b-base, Mellum 2. All 2 shipped with open weights. Every entry below has primary-source links and the episode segment where we covered it live.
JetBrains open-sources Mellum 2, a 12B MoE coding model
JetBrains released Mellum 2, a 12B mixture-of-experts coding model with only 2.5B active parameters, trained from scratch by a small team using a three-stage curriculum over 10T tokens. The panel read it as IDE companies converting years of developer-workflow context into model advantage; it is also available on CoreWeave Inference.
JetBrains open-sources Mellum-4b, its code completion focal model
JetBrains published Mellum-4b-base on Hugging Face, a 4B-parameter model specialized for code completion that powers its IDE AI features. Listed in the episode's open-source links roundup.
Never miss a JetBrains launch — we cover every release live, every Thursday.