When was OpenAI GPT-5 released?

OpenAI GPT-5 was released on 2025-08-15.

What is the context window of GPT-5?

GPT-5 supports a context window of 400K tokens.

GPT-5 pricing is $2.50 per 1M input tokens and $12.00 per 1M output tokens.

GPT-5 is available via API Only on OpenAI API, Azure OpenAI, ChatGPT.

Major Release OpenAI LLM Proprietary

Name: OpenAI GPT-5
Availability: API Only
Author: OpenAI

OpenAI's flagship unified reasoning + chat model replacing the GPT-4 line.

Released 2025-08-15 · ~200B · 400K tokens context · knowledge cutoff 2025-05

OpenAI's next-generation flagship model with adaptive reasoning capabilities

DeveloperOpenAI

Release date2025-08-15

Model typeLLM

Parameters~200B

ArchitectureMoE with unified reasoning router

Context window400K tokens

Max output64K

Knowledge cutoff2025-05

LicenseProprietary

Input modalitiestext, image, audio

Output modalitiestext, audio

$2.50

per 1M input tokens

$12.00

per 1M output tokens

API Only OpenAI API Azure OpenAI ChatGPT