AI21 Labs

AI21 Labs is an enterprise AI company selling an Intelligent Gateway and tuned dedicated models for AI agents, and the maker of the Wordtune writing app.

Teams running AI agents in production come to AI21 Labs to hold accuracy steady while keeping token spend and latency inside a fixed budget. Its Intelligent Gateway is a drop-in endpoint that adds routing, caching and compaction to live agent traffic. Harness Optimization, announced as coming soon, searches agent configurations against a team's own private evals to meet a cost ceiling and a quality floor. Through its Dedicated Model service, AI21 tunes a small open model on a customer's defined workloads. The company also publishes research on pairing open models with frontier models through routing, budget-aware execution and custom trained validators. Its enterprise work starts with a conversation with its team. Its Jamba family of open-weights, long-context language models is sold by usage through the AI21 Studio API. AI21 Labs also makes Wordtune, a writing assistant for individuals that runs as a browser extension, an iOS app and an online editor at wordtune.com, under its own name and mark. Wordtune serves students, writers and professionals who want help rewording, correcting and summarizing their everyday writing.