LaunchAI ModelsOctober 8, 2026

JetBrains releases Mellum2.1, a 12B MoE open model for coding agents

Read original source →marktechpost.com

Mellum2.1 is a 12B mixture-of-experts thinking model activating 2.5B parameters per token, shipping under Apache 2.0 on Hugging Face with a 131,072-token context. It beats Mellum2 on 15 of 17 benchmarks and scores 82.0 on LiveCodeBench v6, but trails Qwen3.5-9B on Terminal-Bench 2.1 (17.4 vs 21.7).

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