# OpenAI — GPT-5 System Card

- Company: OpenAI (openai.com)
- Announced: 2025-08-07T00:00:00+00:00
- Category: research-paper
- Subject: GPT / ChatGPT / API
- Models affected: gpt-5-main, gpt-5-thinking, gpt-5-thinking-nano
- Source: https://openai.com/index/gpt-5-system-card
- Record: https://forck.live/items/501-gpt-5-system-card

OpenAI publishes the GPT-5 system card, detailing a unified model routing system that uses multiple model variants (gpt-5-main, gpt-5-thinking, gpt-5-thinking-nano) for different tasks and developer use cases.

## Evidence

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

> This GPT-5 system card explains how a unified model routing system powers fast and smart responses using gpt-5-main, gpt-5-thinking, and lightweight versions like gpt-5-thinking-nano, optimized for different tasks and developer use.

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Record: https://forck.live/items/501-gpt-5-system-card
Catalogue: https://forck.live/llms.txt
Feed: https://forck.live/feed.md