JetBrains released Mellum2.1, an Apache 2.0, 12B mixture-of-experts thinking model with 2.5B active parameters. RL in real repositories lifted its SWE-bench Verified score from 2.0 to 47.0. The post JetBrains Releases M…
Open-weights releases pressure closed pricing and widen access, changing the build-vs-buy math for the whole ecosystem.
Summaries are aggregated for information only — follow the source link for the full story. Demo entries are illustrative.