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Only Models#Open source ecosystem
  1. Hacker News AI82

    Tencent Launches Hy4, One of the Leading Open-Source AI Models

    Tencent announced Tencent Hy4, its latest-generation large language model, which it says ranks among the world's leading open-source models, with model weights and system cards planned for release in the coming days. Hy4 adds visual understanding and computer-use capabilities for the first time, along with improvements in instruction following, long-context comprehension and long-horizon agentic tasks, and is available across Tencent Cloud TokenHub, WorkBuddy, CodeBuddy, Yuanbao, WeCom's AI Assistant (Dayuan) and ima, with API access via OpenRouter, Hermes and OpenCode. Pricing remains about US$0.90 per million input tokens, US$2.70 per million output tokens and US$0.045 per million cached input tokens, with Hy4 Flash scheduled for release soon.

    Why it matters: The announcement is a detailed primary source on a major open-source model release, including benchmark comparisons, safety assessments and pricing.

  1. Hugging Face Blog80

    Welcome Le Chonk: Mistral Large 4 on Hugging Face

    Mistral Large 4 ("Le Chonk") is a multimodal, multilingual Mixture-of-Experts model with about 1T total and 49B active parameters and a 1M-token context window, released in FP8 and NVFP4 variants under the Mistral Ecosystem Open-Weight License. It combines a 72-layer text decoder using MLA with a DeepSeek Sparse Attention indexer and a 1.6B Pixtral vision encoder, and the post reports 82% on the Artificial Analysis Cyber Index vulnerability reproduce-and-patch test and 93% on Cybench. Day-0 support covers Transformers, vLLM, llama.cpp, TRL fine-tuning, Inference Endpoints and Dell Enterprise Hub, with GGUFs from Unsloth and the llama.cpp team.

    Why it matters: A detailed, hands-on release guide that pairs architecture specifics and benchmark claims with runnable deployment and fine-tuning recipes for a large open-weight model.

  1. Google DeepMind72

    EmbeddingGemma 2: an open, lightweight multimodal embedding model

    Google DeepMind announced EmbeddingGemma 2, a 740-million-parameter model built on the Gemma 4 architecture and released under the Apache 2.0 license, which maps text, code, images, video, and audio into a unified embedding space for on-device use. It offers modular encoders (as little as 270M parameters for text-only, with optional 170M vision and 300M audio encoders), Matryoshka Representation Learning to truncate vectors from 768 down to 128 dimensions, an 8K token context window, and on a Google Pixel 11 Pro requires as little as ~191MB active RAM for text-only weights and ~567MB for the full multimodal model. The company reports a 9.92-point improvement on MTEB Code (68.76 to 78.68) over EmbeddingGemma and says the model is available on Hugging Face and Kaggle, with support across tools including transformers, vLLM, llama.cpp, Ollama, and Qdrant.

    Why it matters: It documents a new open, commercially licensed embedding model with concrete size, memory, and benchmark figures relevant to developers building on-device search and RAG.

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