1/4 We hit a strange logprob mismatch while training Jamba 3B with GRPO. Rollout logprobs and training-side recompute should match before any weight update. Ours didn't. That was the canary. 🧵 [Translated from EN to English]
@ai21labs
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AI21Labs découvre débordement uint32 dans kernel CUDA vLLM Mamba-1
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Thanks to @AI21Labs for tracking down a silent uint32 overflow in vLLM's Mamba-1 CUDA kernel and contributing the fix. Root cause: `uint32_t` stride × cache_index overflows silently at scale. Fix merged in #35275. The debugging story is worth a read. 🔗 ai21.com/blog/vllm-cuda-inte…
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SEAL: From Demo to Production, Concrete AI Engineering
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Most AI demos work. Most AI systems don't. SEAL (@AI21Labs' Solutions Engineering & Architecture Lab) exists to close that gap working with your engineers, not just handing over docs. Sound familiar? Let's talk. [Translated from EN to English]
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Agent Word Losing Meaning in AI Industry
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1/ "Agent" is becoming a meaningless word 🤨
— 🥑 Yet Another (AI) Yuval (@YuvalinTheDeep) 19 mars 2026
Every LLM pipeline is suddenly "agentic." Every wrapper is an "agent framework." The word has been stretched until it broke. pic.twitter.com/jU6xjCx23I1/ "Agent" is becoming a meaningless word 🤨 Every LLM pipeline is suddenly "agentic." Every wrapper is an "agent framework." The word has been stretched until it broke.
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AI21 Labs Building AI Operating System Not Just Agents
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2/ I spent an hour with @BarakLenz, CTO at @AI21Labs, and one thesis kept coming back: we're not building agents. We're building an AI Operating System. An OS manages resources, tracks what's running, and decides when to spawn or kill work. That's the bar.
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AI21 Labs at NVIDIA GTC 26 Booth 3103 Enterprise AI
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Day 2 at @nvidia GTC 26. Stop by booth 3103 to meet the team and learn more about what we’re building for enterprise AI. @NVIDIAAI @NVIDIAAIDev #NVIDIAGTC
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Portfolio Companies Pitch Event with Multiple AI and Tech Leaders
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At the event, we were joined by multiple portfolio companies for a quickfire round of pitches, including @AI21Labs, @anyscalecompute, @Articul8_AI, @bria_ai_, @centrical, @LiltHQ, @Minio, @scale_AI and @zenitysec. Thank you to our portfolio companies for your presentations, and to those in attendance!
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Intel Capital and HSBC Host Enterprise AI Impact and Scale Event
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Intel Capital co-hosted the #EnterpriseAI for Impact and Scale event alongside @HSBC in London last week. The event included a panel on #OperalationalizingAI in enterprise led by @PippaChick and a keynote speech from @UCLEngineering professor Ivana Drobnjak. 🧵
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AI21 Labs to Showcase Enterprise AI Solutions at NVIDIA GTC26
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We are heading to @NVIDIA #GTC26 in San Jose. If you’re attending, stop by Booth 3103 to meet the team and see what we’re building for enterprise AI. See you there.
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Structured-RAG: Solving Aggregative Queries in RAG Systems
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Standard RAG falls apart on aggregative queries. Things like "average ARR for companies with >1k employees" require reasoning across hundreds of docs, and vector retrieval just can't handle that reliably. We built Structured-RAG to fix this:
– induces a schema from your