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Curated tech posts from X on AI, startups, and product development—signal without the doomscroll, updated on weekdays.
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GPT-5.4 Thinking and GPT-5.4 Pro are rolling out now in ChatGPT. GPT-5.4 is also now available in the API and Codex. GPT-5.4 brings our advances in reasoning, coding, and agentic workflows into one frontier model.