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FrontierThe story, in brief

OpenAI GPT-4.5 System Card

OpenAI just dropped GPT-4.5. Here's what changed.

Reporting by OpenAI Blog 1 min brief
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The KeyNews take

Why it matters

OpenAI's latest model release signals the next phase of capability scaling. Leaders need to understand what's new in reasoning, knowledge, and performance to assess competitive positioning and deployment timelines.

The key facts

5 to know

  1. GPT-4.5 announced as research preview

  2. Positioned as largest and most knowledgeable model to date

  3. System card released (safety/capability documentation available)

  4. Released Feb 27, 2025

  5. Research preview status indicates pre-general availability

Go to the source

OpenAI Blogopenai.com

Publisher excerpt: We’re releasing a research preview of OpenAI GPT‑4.5, our largest and most knowledgeable model yet.
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