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.
Changelog
- 2026-09-29: created
Related events
- OpenAI releases GPT-4 ★★★★★
- OpenAI announces o3, scoring 75.7–87.5% on ARC-AGI ★★★★★
- OpenAI releases GPT-5.2 ★★★
- GPT-5 Pro proves an improved convex-optimisation bound, which humans had already surpassed ★★
Sources (2)
id: 2025-08-07-gpt-5 · updated 2026-09-29 · open in the interactive timeline