OpenAI Introduces Its Flagship Model 'GPT-5', Making It the New Default in ChatGPT
OpenAI unveiled its latest model, GPT-5 yesterday, making it available to all ChatGPT users, including those on the free tier, with usage limits varying by subscription level.
It is also integrated into Microsoft 365 Copilot and available to developers through the OpenAI API.
The company made GPTâ5 the new default in ChatGPT, replacing GPTâ4o, OpenAI o3, OpenAI o4-mini, GPTâ4.1, and GPTâ4.5 for signed-in users.
GPTâ5 started to roll out today to all Plus, Pro, Team, and Free users, with access for Enterprise and Edu coming in one week. Pro, Plus, and Team users could also start coding with GPTâ5 in the Codex CLIâ Â by signing in with ChatGPT.
Pro subscribers got unlimited access to GPTâ5, and access to GPTâ5 Pro, for complex tasks and a replacement of OpenAI o3âpro. Plus users have significantly higher usage than free users.
"For ChatGPT free-tier users, full reasoning capabilities may take a few days to fully roll out. Once free users reach their GPTâ5 usage limits, they will transition to GPTâ5 mini, a smaller, faster, and highly capable model," said OpenAI.
During a livestream presentation [watch in the video below], the company's CEO, Sam Altman, described the model as "having a team of experts on call for whatever you want to know." He defined it as "our smartest, fastest, most useful model yet, with built-in thinking that puts expert-level intelligence in everyone's hands."
GPTâ5 provides more useful responses across math, science, finance, and law. It includes 128,000 max output tokens. The price per 1 million tokens for the API is $1.25.
The tools supported by this model when using the Responses API are Web search, File search, Image generation, Code interpreter, and MCP.
OpenAI's executives who participated in the virtual presentation highlighted the coding capabilities of GPT-5, tackling "complex tasks end-to-end and delivering more readily usable code, better design, and is more effective at debugging."
GPTâ5 is OpenAI's most advanced model for coding and agentic tasks. It produces high-quality code, generates front-end UI with minimal prompting, and shows improvements to personality, steerability, and executing long chains of tool calls."
GPTâ5 also showed âminimalâ reasoning and a âverbosityâ parameter in the API.
⢠Pricing and Characteristics
⢠Release Notes
⢠Research Paper
GPT-5 has 4 new chat personalities: Cynic, Robot, Listener, Nerd.
Find them in Customize ChatGPT in settings.
Research preview. Text-only. Opt-in. Change anytime.
Written by Robot in GPT-5. pic.twitter.com/XxyWYNYxHt
â OpenAI (@OpenAI) August 7, 2025