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  "text": "Before the week ends, let's acknowledge one of the most INSANE week ever for open AI, with 25+ notable open-weight drops across every modality:\n\n🧠 LLMs\n\n→ NVIDIA Nemotron 3 Ultra: 550B hybrid Mamba-MoE, only 55B active, 1M context, MMLU 89.1. NVFP4 variant claims ~5x throughput on Blackwell. First openly-weighted 550B hybrid Mamba-Transformer, closing the gap with frontier closed models.\n\n→ Google Gemma 4 12B: fully open dense any-to-any (text/image/audio/video), 256k context, encoder-free, 140+ languages, AIME 2026 at 77.5. Shipped with a 23-checkpoint QAT wave (mobile ONNX + MLX). Most deployable model of the week.\n\n→ StepFun Step-3.7-Flash: 198B sparse MoE VLM, ~11B active, SWE-Bench PRO 56.3. Apache 2.0.\n\n→ Liquid AI LFM2.5-8B-A1B: edge MoE, just 1.5B active, 128k ctx, MATH500 88.8, MLX-ready. Best on-device option this week.\n\n→ JetBrains Mellum2-12B-A2.5B-Thinking: their first open MoE, near-Qwen3-14B coding at 2.5B active. Apache 2.0.\n\n🎨 Image gen (the surprise of the week)\n\n→ Ideogram 4: their FIRST-EVER open weights. 9.3B flow-matching DiT trained from scratch. #2 overall behind GPT Image 2, top open-weight model on Design Arena + LMArena. Strongest open checkpoint for text-rich images, full stop. It has taste. Still can't believe this is open weights.\n\n🔊 Audio & Speech (a breakout week for open TTS, 4 labs shipped)\n\n→ Boson Higgs Audio v3 4B: 102 languages, 21 emotions, singing/whispering/shouting, sub-second TTFA.\n→ RedNote dots.tts: the only fully continuous (no codec) open TTS pipeline, Apache 2.0.\n→ Google Magenta RealTime 2: real-time music gen, <200ms latency, text+audio+MIDI. multimodalart ported it to PyTorch within hours with live ZeroGPU demos.\n→ NVIDIA Nemotron-3.5 ASR: 600M streaming, 17x more concurrent streams vs Parakeet RNNT 1.1B.\n\n👁️ Vision & VLMs\n\n→ PaddleOCR-VL-1.6: SOTA document parsing at 1B params, Apache 2.0.\n→ Baidu NAVA: 6.3B joint audio-video gen, best-in-class A/V sync, Apache 2.0.\n\n🎬 Video, 3D & World Models\n\n→ NVIDIA Cosmos3-Super: 64B omnimodal world model coupling action trajectories with video+audio gen, for Physical AI.\n→ JD JoyAI-Echo: up to 5-min multi-shot text-to-video on LTX-2.3.\n→ ByteDance Bernini-R + VAST TripoSplat (single-image-to-3D Gaussian splats, MIT).",
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