# OpenAI — OpenAI GPT-4.5 System Card

- Company: OpenAI (openai.com)
- Announced: 2025-02-27T12:00:00+00:00
- Category: new-model
- Subject: GPT / ChatGPT / API
- Models affected: GPT‑4.5
- Source: https://openai.com/index/gpt-4-5-system-card
- Record: https://forck.live/items/615-openai-gpt-4-5-system-card

OpenAI releases a research preview of GPT-4.5, described as its largest and most knowledgeable model.

## Evidence

Verbatim from https://openai.com/index/gpt-4-5-system-card:

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

---

Record: https://forck.live/items/615-openai-gpt-4-5-system-card
Catalogue: https://forck.live/llms.txt
Feed: https://forck.live/feed.md