# Snapshot lists under lock to avoid iteration issues
February 21, 2026
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Data processing agreement
When users turn to GPT-5.4 in ChatGPT, where it will now be the default model for the chatbot's Thinking mode, the system will outline how it plans to tackle a request, giving people the opportunity to tell it to adjust course as it's generating a response. At the same time, the new model offers better web research capabilities, especially when it comes to "highly specific" queries, according to OpenAI.
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