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Mellum2.1

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12:34
2026-10-08
blog.jetbrains.com
artificial-intelligence

Mellum2.1 Gets to Work: A Fast Open Model for Coding Agents

JetBrains released Mellum2.1, a 12B mixture-of-experts coding model with 2.5B active parameters under the Apache 2.0 license, trained primarily with reinforcement learning across millions of sandboxed…

// co-occurs with top 7 entities
JetBrains 1 Mellum2 1 Qwen3.5-9B 1 Gemma 4 E4B 1 Hugging Face 1 llama.cpp 1 vLLM 1
// topics top 5 topics
artificial intelligence 1 large language models 1 ai agents 1 ai tools 1 developer tools 1