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OpenAI launches GPT-5.5 Instant as new ChatGPT default

OpenAI is rolling out GPT-5.5 Instant as ChatGPT’s new default model, replacing GPT-5.3 Instant. It delivers shorter, clearer answers, fewer false claims, stronger reasoning, and added personalization through memory, files, and Gmail context.

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TestingCatalog AI News OpenAI launches GPT-5.5 Instant as new ChatGPT default OpenAI launches GPT-5.5 Instant as the new ChatGPT default, offering clearer, faster answers and personalized context for all users.
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