GPT-5.2 is Here: What Early Testers Are Saying

OpenAI has officially released GPT-5.2 and the reactions from early testers – OpenAI seeded the model to some testers days or even weeks before public release – paints a mixed picture: it’s a huge step forward for deep, autonomous reasoning and coding, but might be a less noticeable “incremental” update for everyday conversations.

Following early access and today’s wider release, executives, developers, and analysts have shared their first testing results on X (formerly Twitter) and company blogs.

Here’s a roundup of the first reactions to OpenAI’s latest flagship model.

“AI as a serious analyst”

The strongest praise for GPT-5.2 focuses on its ability to tackle “hard problems” that require notable thinking time.

Matt Shumer, CEO of HyperWriteAI, didn’t hold back in his review, calling GPT-5.2 Pro “the best model in the world.”

Shumer highlighted the model’s persistence, noting that “it thinks for over an hour on hard problems. And it nails tasks no other model can touch.”

This view was echoed by allie K. Miller, an AI entrepreneur and former AWS executive. Miller described the model as a step toward “AI as a serious analyst” rather than a “friendly companion.”

“The thinking and problem-solving feel noticeably stronger,” Miller wrote on X. “It gives much deeper explanations than I’m used to seeing. At one point it literally wrote code to improve its own OCR in the middle of a task.”

Enterprise gains: Box reports distinct performance jumps

For businesses, the update seems even more impactful.

Aaron Levie, CEO of Box, revealed on X that his company was testing GPT-5.2 in early access. Levie reported the model performs “7 points better than GPT-5.1” on their reasoning tests, which simulate real-world knowledge work in finance.