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AI X/Twitter Mar 31, 2026 2 min read

Meta said on March 27, 2026 that SAM 3.1 is a drop-in update to SAM 3 that improves video processing efficiency through object multiplexing. The project's release notes say the update introduces shared-memory joint multi-object tracking, new checkpoints, and about 7x speedup at 128 objects on a single H100 compared with the November 2025 SAM 3 release.

AI Mar 23, 2026 2 min read

On March 16, 2026, NVIDIA launched the Nemotron Coalition, an open-model collaboration with Black Forest Labs, Cursor, LangChain, Mistral AI, Perplexity, Reflection AI, Sarvam, and Thinking Machines Lab. The first coalition model will be trained on NVIDIA DGX Cloud and serve as the basis for the upcoming Nemotron 4 family.

LLM Reddit Mar 17, 2026 3 min read

A r/LocalLLaMA post that reached 92 points and 25 comments spotlighted Covenant-72B as a 72B-parameter model trained from scratch by 20+ participants through decentralized infrastructure on the Bittensor blockchain. The most credible story here is not an unsupported performance victory, but a concrete demonstration of permissionless collaborative pre-training, SparseLoCo-based communication reduction, Apache 2.0 licensing, and a separate chat-tuned variant.