Conference

AI Engineer World’s Fair 2026

The AI Engineer World’s Fair is the largest technical AI conference in the world — 29 tracks, 300 speakers, and 6,000+ AI engineers, founders, and VPs of AI, taking place June 29 – July 2 in San Francisco. And this year, AI21 is part of it.

We’re proud to have two members of our team taking the stage with talks that go deep on the real challenges of building reliable AI systems.

Yuval Belfer, Senior Developer Advocate, will challenge everything you think you know about RAG in his talk “Stop Chunking Like It’s 2022” (Day 2, 14:50). Fixed chunk sizes are a silent performance killer — Yuval will show why no single chunk size works for all queries, and how a dead-simple multi-index approach can deliver up to 37% better recall. No retraining. No LLM overhead. Just better retrieval.

Asaf Gardin, Senior Software Engineer, joins Yuval Belfer for “Two Bugs That Hid in Plain Sight: A vLLM Debugging Detective Story” (Day 4, 14:50). Drawing from real experiences building Jamba models, they walk through two subtle vLLM bugs that failed silently — no stack traces, just wrong answers with perfect confidence — and the systematic approach used to surface and fix them.

Come find us at the expo, catch the talks, and connect with the engineers building at the frontier of AI.