OpenAI has officially launched GPT-5, calling it their most potent and capable model to date. The new model is available as the default in ChatGPT, replacing GPT‑4o, OpenAI o3, OpenAI o4-mini, GPT‑4.1, and GPT‑4.5 for signed-in users. It is claimed to outperform previous models across industry benchmarks, scoring 74.9% on SWE-bench Verified and a record 88% on Aider polyglot, which measures code editing accuracy.
OpenAI, in its blog post, said that GPT-5 is released in three sizes: GPT-5, GPT-5-mini, and GPT-5-nano, giving users the ability to balance performance, cost, and speed. Here’s everything you need to know.
GPT-5 provides a quick answer, depending on the complexity of your question. It’s also noticeably better at writing, answering real-world questions, and especially coding. It can build websites, apps, and even games in a single prompt, with cleaner code and a better sense of design. It’s also more accurate and more responsive.
Additionally, it’s also their most advanced health assistant yet. GPT-5 can deliver significantly more accurate and context-aware responses to health-related questions. While it doesn’t replace a doctor, it can help users better understand medical information, ask more thoughtful questions, and make informed decisions.
Further, it is said to set a new state of the art across math (94.6% on AIME 2025 without tools), real-world coding (74.9% on SWE-bench Verified, 88% on Aider Polyglot), multimodal understanding (84.2% on MMMU), and health (46.2% on HealthBench Hard).
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GPT-5 will also allow users to pick a custom chat colour, with exclusive shades unlocked for Pro subscribers. It is also getting four built-in personalities- Cynic, Robot, Listener, and Nerd, letting users prefer how the AI responds – sarcastic, supportive, or straightforward.
For productivity, Pro users will soon be able to connect Gmail, Google Calendar, and Google Contacts directly to ChatGPT.
Voice interactions are also getting smarter. The new Advanced Voice feature can better understand users’ tone and adapt its responses in real-time. Though it’s available to all users, higher usage limits are available for paid plans. OpenAI is also retiring the older Standard Voice Mode in 30 days.
GPT‑5 rolling out to all Plus, Pro, Team, and Free users starting today. Access for Enterprise and Edu will be made available in one week. Pro, Plus, and Team users can also do coding with GPT‑5 in the Codex CLI by simply signing in to ChatGPT.