Jamba Mini 1.7
AI21 Labs · 2025-07-03 · 51.6B parameters
Jamba Mini 1.7 is AI21 Labs' open-weight hybrid Mamba–Transformer MoE model, publicly released on July 3, 2025; its checkpoint contains 51,570,323,328 parameters, while AI21 describes it as 52B total/12B active, and it supports a 262,144-token context. It updates Jamba Mini 1.6 with improved grounding and instruction following, and its 32-layer architecture combines Mamba and GQA layers with 16 experts and top-2 routing. AI21 launched it for both self-hosted use and Studio access; the Studio API snapshot was deprecated on February 1, 2026.