GPT-5 is 📝OpenAI's fifth-generation 📝GPT model, released August 7, 2025, which unified fast responses and deeper reasoning behind a single router in 📝ChatGPT.

GPT-5 replaced the 📝GPT-4-series and the separate o-series reasoning models with one system: a fast model for everyday questions, a "GPT-5 thinking" model for harder problems, and a real-time router that chose between them, so users no longer had to pick a model. OpenAI positioned it around practical work — coding, analysis, and agentic tasks — and claimed fewer 📝hallucinations than earlier models. Its launch also drew a user backlash when GPT-4o was removed from ChatGPT, and OpenAI restored GPT-4o for paying users within days.

Key Facts

Released: August 7, 2025
Variants: GPT-5, GPT-5 mini, GPT-5 nano, and GPT-5 pro
Predecessors: the GPT-4-series and the o-series reasoning models
Successors: GPT-5.1 (November 2025) through 📝GPT-5.5 (April 2026) and GPT-5.6 Sol, Terra, and Luna (July 2026)
ChatGPT retirement: February 13, 2026
API shutdown: the original gpt-5-2025-08-07 snapshot on December 11, 2026, with GPT-5.6 Sol as the recommended replacement

At Launch

At release, GPT-5 was priced below 📝xAI's 📝Grok 4 and 📝Anthropic's Claude Opus 4.1, and in many cases undercut 📝Google's 📝Gemini models. On reasoning benchmarks, Grok 4 still led on 📝ARC‑AGI-2, scoring around 15.9% compared with GPT-5's roughly 9.9%.

Source: ARC-AGI Leaderboard

FAQ

When was GPT-5 released?

OpenAI released GPT-5 on August 7, 2025, in ChatGPT and the API.

Is GPT-5 still available?

Not in ChatGPT, which retired it on February 13, 2026. The original API snapshot remains available until December 11, 2026.

What replaced GPT-5?

A rapid series of updates, from GPT-5.1 through GPT-5.6, followed by the GPT-6 family in September 2026.

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