Yes I know. We helped show the PyTorch team how to train Llama efficiently – they have a whole GPU Mode talk about it. These issues do not at all line with your claims however.
OPEN SOURCE
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OpenAI’s Open-Source Models Beat Commercial Pricing Benchmarks
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As benchmarks for OpenAI's new open-source models roll in, one thing to keep in mind is how cheap they actually are: – GPT OSS 20b is cheaper than Gemini 2.5 Flash Light or GPT-4.1-Nano.
– GPT OSS 120b is cheaper than recent open-source models from China (e.g., Kimi K2 or GLM -
GPT-OSS Reaches Number 1 Trending on Hugging Face
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We’re already #1 trending on @huggingface with gpt-oss! Huge thanks to the open-source AI community for the love.
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H100 GPU costs for 120B and 20B LLM model training
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According to the model card gpt-oss-120b took 2.1 million H100-hours and the 20b model 1/10th of that I found quotes for H100 pricing ranging from $2/hour to $11/hour, which would indicate that the 120b model cost between $4.2m and $23.1m and the 20b between $420,000 and $2.3m
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Open Source AI Model Training Details and Documentation
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Added an extra section with interesting details from the model card about how the models were trained https://
simonwillison.net/2025/Aug/5/gpt
-oss/#the-model-card
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OpenAI Releases Two Open Weight Models Including gpt-oss-120b
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I'm thrilled @OpenAI has released two open weight models. Thank you to all my friends at OpenAI for this gift! I'm also encouraged that from my quick tests gpt-oss-120b looks strong (though we should still wait for rigorous 3rd party evals).
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GPT-OSS Models Now Available in AI SDK Playground
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Both gpt-oss-120b and gpt-oss-20b are now in @aisdk and you can test them nicely side-by-side in the AI SDK playground. ▲
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US Open Weight Models Lead: Sustainability or One-Off Advantage?
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The US now likely has the leading open weights models (or close to it)… … but the real question is whether this is a one-off situation from OpenAI, in which case the lead will evaporate quickly as others catch up. But also unclear what their incentives are to keep updating.
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Running AI Models Locally and via APIs with LM Studio
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My full piece on the models, including various pelicans on bicycles and detailed notes on running them on my own laptop using @lmstudio and @ollama – and via API using @openrouter and @cerebras
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OpenAI Open Weights Models Rival Chinese AI Labs
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Here's the concluding section of my write-up of the new OpenAI open weights models – they're really impressive, and I think they hold their own (or even beat) the models we've seen come out of the various Chinese AI labs over the past few months