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JetBrains releases small MoE 'Mellum2.1-12B-A2.5B-Thinking' in GGUF (per community)

What happened

JetBrains' 'Mellum2.1' collection was shared on Reddit's r/LocalLLaMA. The shared model name is 'Mellum2.1-12B-A2.5B-Thinking-GGUF', which appears to be an MoE with 12B total and 2.5B active parameters. No official announcement is included in the source material.

Why it matters

A small reasoning MoE from an IDE maker that can run locally adds to the on-device model options for developer tools.

Confidence low · official source pending

Sources