GPT-5.5 Pro

openai-gpt-5-5-pro

fields

nameREQ	GPT-5.5 Pro	help.openai.com	2026-05-03
vendorREQ	OpenAI	help.openai.com	2026-05-03
released_at	2026-04-26	help.openai.com	2026-05-03
modality	text, code, vision	help.openai.com	2026-05-03
access	closed	help.openai.com	2026-05-03
context_window	409600	help.openai.com	2026-05-03
parameters
benchmark_score
benchmark_name
announcement_url	https://help.openai.com/en/articles/11909943-gpt-53-and-gpt-55-in-chatgpt	help.openai.com	2026-05-03

history · 7 fields · 7 revisions

name1 revision

GPT-5.5 Pro current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).

vendor1 revision

OpenAI current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).

released_at1 revision

2026-04-26 current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).

modality1 revision

text, code, vision current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).

access1 revision

closed current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).

context_window1 revision

409600 current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).

announcement_url1 revision

https://help.openai.com/en/articles/11909943-gpt-53-and-gpt-55-in-chatgpt current help.openai.com · 2026-05-03

GPT-5.5 Pro is the highest-capability GPT-5.5 option in ChatGPT for the hardest tasks and long-running workflows. Pro tier: 400k (272k input + 128k max output).