---
id: "2025-08-07-gpt-5"
url: "https://postcutoff.com/e/2025-08-07-gpt-5/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2025-08-07"
date_precision: day
category: model-release
importance: 5
confidence: high
status: [Confirmed]
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2025-08-07-gpt-5/

# OpenAI launches GPT-5

GPT-5 unified OpenAI's fast and reasoning models into one system with a real-time router, becoming the default ChatGPT model for all users with state-of-the-art results in coding, math and health, and reduced hallucinations.

## Key facts
- Released 7 August 2025 to all ChatGPT users, including free tier
- SWE-bench Verified: 74.9%, per OpenAI
- AIME 2025 (no tools): 94.6%, per OpenAI
- Unified system: fast model + GPT-5 thinking + router
- API family: gpt-5, gpt-5-mini, gpt-5-nano; followed by GPT-5.1 (November) and GPT-5.2 (December 2025)

## What happened

After over two years of anticipation, OpenAI shipped GPT-5; reception mixed praise for capability with complaints over the removal of older models, which were partly restored.

## Why it matters

Brought reasoning-model capability to hundreds of millions of free users by default.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Introducing GPT-5 (OpenAI)](https://openai.com/index/introducing-gpt-5/) (openai.com, official)
2. [GPT-5 System Card (OpenAI)](https://openai.com/index/gpt-5-system-card/) (openai.com, docs)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2025-12-11: [OpenAI releases GPT-5.2](https://postcutoff.com/e/2025-12-11-gpt-5-2/index.md)
- 2024-12-20: [OpenAI announces o3, scoring 75.7–87.5% on ARC-AGI](https://postcutoff.com/e/2024-12-20-openai-o3/index.md)
- 2023-03-14: [OpenAI releases GPT-4](https://postcutoff.com/e/2023-03-14-gpt-4/index.md)