OpenAI
San Francisco, CA · Founded 2015
OpenAI is a leading AI research organization behind GPT-4o, GPT-4 Turbo, and the o1 reasoning model series. Their models power ChatGPT and millions of applications worldwide.
OpenAI Models (3)
GPT-5.4
OpenAI's most capable frontier model — advanced reasoning, 256K context, and full multimodal support.
$2.5/1M in262,144 ctx
GPT-5.4 mini
Budget-friendly intelligence with a surprisingly capable 256K context window.
$0.75/1M in262,144 ctx
GPT-5.5
OpenAI's most intelligent model — expert-level coding, reasoning, and a 512K context window.
$5/1M in524,288 ctx