{"data":{"slug":"jamba","etype":"model","name":"AI21 Jamba","cat":"Language","subtitle":"The production hybrid: Mamba state-space layers + transformer attention.","summary":"Jamba (2024–25) interleaves Mamba SSM blocks with attention to cut memory and speed long contexts — the most prominent deployed challenge to pure transformer orthodoxy, shipped as open models up to ~400B total parameters.","attrs":null,"kf":{"params":"52B–398B MoE hybrids","context":"256K","weights":"Open","modality":"Text","rel_date":"2024-03","developer":"AI21 Labs"},"aliases":["Jamba 1.5"],"ticker":null,"exchange":null,"hq":null,"founded":null,"website":null,"status":"Current","region":null,"asof":"2026-01-15","sources":[{"url":"https://www.ai21.com/jamba/","label":"Jamba"}]},"meta":{"found":true,"count":1,"served_from":"site cache (no live upstream calls)","as_of":"2026-10-14T06:34:25+00:00","disclaimer":"Research and information only — not investment advice. Structured records carry basis labels (vendor spec / reported / estimate); market quotes are delayed/indicative.","attribution":"Records compiled from vendor documentation, official filings and reputable public reporting; market quotes via financial data providers. See /data-sources."}}