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  areoform
  > we are open-sourcing two foundation models co-developed by Hy4 and Hyra 2.0: HyCell for single-cell representation and HyPDE for physical field modeling. What a refreshing contrast. Where American startups brag about stopping researchers from writing grants about neglected tropical diseases and making novel anti-depressants, these folks are open sourcing the means to do science. https://news.ycombinator.com/item?id=49651727That's how you get a civilizational advantage. By allowing people to just do things. It's so bizarre to watch China embrace the wonders of science and technology, while certain American startups and communities repeat "WHAT ABOUT THE BIOWEAPONS?"The American century has been fumbled hard.
• frangonf
  > Looking ahead > Although Hy4 is one of the strongest open-weight models available today, a notable gap remains between it and top proprietary models, particularly on challenging internal benchmarks for research-level mathematics, long-horizon coding, model self-improvement, and advanced visual question answering. We will continue to steadily scale pre-training and post-training to narrow this gap.I like that they acknowledge that. For working with ai as a tool open models are already great. For millennium problems and doomermaxxing they are not there yet.
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  simonw
  The game development focus is interesting:> For game development, we partnered with professional developers at Tencent Interactive Entertainment Group (IEG) to curate high-quality training data and build evaluations. We focused on feature implementation, gameplay logic, state tracking, and asset pipelines. We also extensively adapted Hy4 for major engines such as Unreal Engine, Unity, and Godot, and expanded its capabilities to multiplayer game development. Compared with Hy4 preview, Hy4 improves by 19.1% on GameDev and 9.8% on GameLogic.Here's more about that game development studio - https://en.wikipedia.org/wiki/Tencent_Games - they've been around since 2004.
• chriddyp
  Landed on the cost/accuracy frontier in our data analytics benchmark: https://plotly.com/blog/tencent-hy4-plotly-data-analytics-be..., right in between GPT-6.1 Sol and GPT-6.1 Terra.Verrrry thorough in its work and therefore verrrrry slow. It spent a long time with each question, running about 26 queries for each question, and in some questions it ran 64 queries. One of the queries that it wrote also took about an hour to run, which affected its overall exam time.Last year the open weight models were the cheap & good alternatives. Then in September/October that cost story got rewritten by the GPT-6 series and Claude's 5 series.Hy4 brings open models back on the cost/accuracy frontier, but its behavior is too thorough + slow.Another thing we're seeing is that post training open models is starting to see results. Particle-1 from last week is also on our frontier, which is post-trained on DeepSeek V4.1 and Fireworks Ember-1 from a few weeks ago was post-trained on Kimi K3.Take these numbers with a grain of salt: this exam is just for short horizon, low-context data analysis tasks, not full-fledged software projects.
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  minimaxir
  Slightly worse than Kimi 3.1M Pro (which just released open weights today) but much cheaper even excluding the current 50% off promotion, and Tencent promises to make it even cheaper once it goes open-weight. Interesting price economics.
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  erulabs
  increasingly feeling like the entire US economy hangs on whether or not Ant/OAI can stay ahead of the Chinese models.If the gap closes, we do zero austerity, and interest rates are high, I cannot see a way out of a major economic crisis, even if we do start to see dramatic productivity wins.More on-topic (and maybe more positive?), but this model feels a bit more expensive than I would have expected!
• bezko
  Refreshing to see normal looking bar charts for the benchmarks for once. Yes it shows they are in the middle of the pack but at least we can understand.
• ByteAtATime
  The price numbers look weirdly specific, I wonder where they came from.Personally, the thing I'm most excited about is the FrontierCode 2.0 score, which is a benchmark I trust a bit more - 31 seems to be roughly on par with 6.1 Sol and Opus 5.5 medium
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  esafak
  Not cost competitive. The performance difference is not commensurate with the price. Model | Cached Input | Input (Miss) | Output ---------------|--------------|--------------|---------- Tencent Hy4 | $0.042 | $0.83 | $2.50 DeepSeek (peak)| $0.006 | $0.30 | $1.20 DeepSeek (off) | $0.003 | $0.15 | $0.60
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  syntaxing
  Similar to Kimi K3.1 Pro, they nuked their cyber security skills too.
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  Computer0
  How does it do with tasks anthropic doesn’t like? This is my main use case for open models.
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  derac
  Videos 1 and 4 on vision and computer use are wild. They depict the model finding a 2m feature from a large satellite image, then determining where a photo was taken. Is it just me or do the Chinese model releases have less concern about looking like a military weapon? I don't think it's a bad thing necessarily, it seems honest. Also the music they choose for it is hilarious.
• maelito
  Another model, another broken website. I can't even zoom on the benchmarks.Le cordonnier mal chaussé.
• thefourthchime
  PacBench results.Tencent Hy4 ties DeepSeek V4.1 Flash at 82/100, in 23.2 min for $0.30 vs 20.1 min for $2.26. Same game quality for about a seventh of the price. Cheap models keep closing the gap.Model: https://jonclegg.github.io/pacman-bakeoff/#tencent-hy4Closest: https://jonclegg.github.io/pacman-bakeoff/#deepseek-v4.1-fla...