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Tom’s Guide
Technology
Amanda Caswell

ChatGPT’s new ‘Thinking’ mode just hit a 94% reasoning score — 7 prompts it can solve that standard AI can’t

ChatGPT OpenAI Google
Human vs. robot face with ChatGPT on phone.

OpenAI recently updated GPT-5.4 with a feature that has the tech world buzzing: Extended Thinking mode. While the base model is already lightning-fast, this new toggle allows the AI to "ruminate"—running internal simulations and self-correcting before it ever types a single word of its response.

The results are a staggering 94% success rate on the ARC-AGI-1 reasoning benchmark, finally surpassing the 92.8% score held by human experts in the same category.

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