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Introducing ChatGPT - OpenAI
We’ve trained a model called ChatGPT which interacts in a conversational way. The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests.
API Platform | OpenAI
Our API platform offers our latest models and guides for safety best practices.
GPT-4 | OpenAI
GPT-4 is more creative and collaborative than ever before. It can generate, edit, and iterate with users on creative and technical writing tasks, such as composing songs, writing screenplays, or learning a user’s writing style.
Hello GPT‑4o - OpenAI
GPT‑4o (“o” for “omni”) is a step towards much more natural human-computer interaction—it accepts as input any combination of text, audio, image, and video and generates any combination of text, audio, and image outputs.
OpenAI Platform
Build on the OpenAI API Platform Sign up or login with an OpenAI account to build with the OpenAI API.
Introducing GPT-4o and more tools to ChatGPT free users
In line with our mission, we are focused on advancing AI technology and ensuring it is accessible and beneficial to everyone. Today we are introducing our newest model, GPT‑4o, and will be rolling out more intelligence and advanced tools to ChatGPT for free.
GPT‑5 is here - OpenAI
GPT‑5 excels at writing, research, analysis, coding, and problem-solving. It delivers more accurate, professional responses and feels like collaborating with a smart, thoughtful colleague.
DALL·E 3 | OpenAI
DALL·E 3 understands significantly more nuance and detail than our previous systems, allowing you to easily translate your ideas into exceptionally accurate images.
Tokenizer - OpenAI API
A helpful rule of thumb is that one token generally corresponds to ~4 characters of text for common English text. This translates to roughly ¾ of a word (so 100 tokens ~= 75 words). If you need a programmatic interface for tokenizing text, check out our tiktoken package for Python. For JavaScript, the community-supported @dbdq/tiktoken package works with most GPT models.
Models - OpenAI API
Choose GPT-5.6 Terra to balance intelligence and cost, or GPT-5.6 Luna for cost-sensitive, high-volume workloads. All latest OpenAI models support text and image input, text output, multilingual capabilities, and vision.
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