GPT-4.5, internally called Orion, is available via the $200-per-month ChatGPT Pro subscription; OpenAI researchers say it is huge and compute-intensive (Reece Rogers/Wired)

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Reece Rogers / Wired:GPT-4.5, internally called Orion, is available via the $200-per-month ChatGPT Pro subscription; OpenAI researchers say it is huge and compute-intensive  —  Internally called Orion, GPT-4.5 is OpenAI's largest model to date, and it's only available through the company's $200 monthly ChatGPT subscription.