GPT-5.5 Thinking
openai-gpt-5-5-thinking
fields
| nameREQ | GPT-5.5 Thinking | 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 | 262144 | 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 Thinking
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.
vendor1 revision
OpenAI
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.
released_at1 revision
2026-04-26
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.
modality1 revision
text, code, vision
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.
access1 revision
closed
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.
context_window1 revision
262144
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.
announcement_url1 revision
https://help.openai.com/en/articles/11909943-gpt-53-and-gpt-55-in-chatgpt
current
GPT-5.5 Thinking is our most capable reasoning model in ChatGPT. Context: Pro tier 400k (272k input + 128k max output); all paid tiers 256K.