LLM · OpenAI · Pro

GPT-5.5

Chat, write and think through problems with GPT-5.5: reads images and a reasoning mode.

LLM · OpenAI · Pro

About GPT-5.5

Understands
Text, image
Reasoning
Yes
Web search
No
Model context window
1,050,000 tokens
Access
Subscription or credits

Questions

Is GPT-5.5 free?

GPT-5.5 is a Pro model on Montagea: it needs a subscription or a credit pack.

What is the context window of GPT-5.5?

The API route for GPT-5.5 supports a context window of up to 1,050,000 tokens. Uploaded files and conversation history also use this window; Montagea applies separate attachment and response limits.

Can GPT-5.5 read images or video?

It reads images you attach; video is not supported.

Does GPT-5.5 have a reasoning mode?

Yes. Turn on thinking for harder problems: it takes longer but reasons more carefully.

GPT-5.5: AI Chat & Writing Online | Montagea