OpenAI does Open, and launches ChatGPT5 OpenAI aimed for two big splashes this week, releasing a set of open-source models for the first time since 2019 and launching GPT5. OpenAI was supposed to be, well, open, but it stopped making the models public as a matter of responsibility and principle on the claim that this was too 'dangerous'. However, first Meta and then a wave of Chinese companies have released a series of best-in-class open models, and so Sam Altman has been strategising: relevance might be more important than principles. GPT-OSS does nothing very different, but it comes in the standard range of sizes and weights and gets into the top 10 or so on most benchmarks: if you need to run and customise models yourself, Llama is too far behind and you can't use the Chinese models, OpenAI is there for you, presuming of course you trust OpenAI not to change course again. Sam Altman is playing chess again. GPT5 is a more complex story: it continues the steady improvement of LLMs and puts OpenAI back at the top of the benchmarks but isn't reallya step change in capability, with one exception. Like most model releases these days, 'GPT5' is actually a family of large and small models, trading off cost and quality versus speed and ability to run on a PC versus a server farm. But that has given us the much-mocked 'model picker', where you're supposed to know if your task needs GPTo3, o4, 4o or Mini Pro Plus. GPT5 is a system that comes with a component that acts as a router, deciding for itself which underlying model to send your task to. See this week's column. GPT-5, OPEN SOURCE Google does video simulation The third big story this week was Google's release of Genie 3, which can generate realistic 3D worlds in real time as you move through them. AAA games have become enormously expensive to produce in recent years, with huge numbers of people away building all of those elastic environments by hand; it seems pretty clear that AI will automate a lot of that, at a minimum, and it may also lead to entirely new kinds of experiences, much as 3D itself or networking did. LINK The week in AI Google has been talking to advertisers about its plans to include ads in 'AI Mode' search results. LINK Elon Musk also said he plans to include ads in results from xAI's LLM Grok (the one that called itself 'MechaHitler'), building on his success in attracting advertisers back to Twitter. LINK Cloudflare (CDN) accused Perplexity of not just ignoring robots.txt requests not to crawl websites, but of hiding the identity of its crawlers to read websites that are actively trying to block it. LINK Eleven Music's latest generator is out, and worth playing with. I'm old enough to remember when synths destroyed creativity. LINK News from autonomy Tesla shut down its 'Dojo' project to build its own supercomputer to analyse driving data (which last year was supposedly worth tens of billions of dollars) - this might be because Elon Musk's xAI has plenty of its own compute available on easy terms to Tesla. LINK Meanwhile, Amazon's Zoox got clearance to test in public. Zoox has the unusual approach to autonomy of making an entirely new vehicle, which I honestly don't understand - once autonomy works then cars can be redesigned with no steering wheel, sure, but why spend the money on that in advance? LINK And further out again, Joby (electric helicopters) is buying Blade, which does helicopter shuttles around NYC, planning to use it as a route-to-market. LINK Apple gives Trump a trinket In 'Godfather II', the Cuban representative of ITT gave President Batista a solid gold telephone. In 2025, Apple's Tim Cook gave President Trump a piece of Corning Glass on a gold plinth. LINK, CUBA | 
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