GPT‑5.5 launches with 1.1M‑token context window and $5 entry price

OpenAI’s GPT-5.5 is now listed with a 1.1 million-token context window and entry pricing of $5 per 1 million input tokens, according to CloudPrice’s public model page updated May 16. The listing says the model is available from five providers — OpenAI, Microsoft Azure AI Foundry, OpenRouter, Snowflake Cortex AI and Vercel AI Gateway. OpenAI’s API pages also show GPT-5.5 priced at $5 per 1 million input tokens and $30 per 1 million output tokens. CloudPrice lists the model’s release date as April 23, 2026 and says it supports text, image and PDF inputs. ### How big is a 1.1 million-token context window? CloudPrice lists GPT-5.5 with a 1.1 million-token context window and a maximum output of 128,000 tokens. OpenAI’s API page lists GPT-5.5 at 1.05 million context length and 128,000 max output tokens, a small discrepancy that appears to reflect rounding between sources. OpenAI’s tokenizer documentation says 100 tokens is roughly 75 words in common English text, which implies that a million-token window can hold very large document sets, long codebases or extended multi-turn histories. (cloudprice.net) ### What does the $5 entry price actually cover? OpenAI’s pricing page lists GPT-5.5 input at $5 per 1 million tokens and output at $30 per 1 million tokens. CloudPrice shows the same starting rate at OpenAI, Azure AI Foundry, OpenRouter and Vercel AI Gateway, while Snowflake Cortex AI is listed at $5.50 per 1 million input tokens and $33 per 1 million output tokens. CloudPrice also shows lower batch pricing at OpenAI of $2.50 per 1 million input tokens and $15 per 1 million output tokens. (cloudprice.net) ### Which providers are offering it now? CloudPrice names five providers on its GPT-5.5 page: OpenAI, Microsoft Azure AI Foundry, OpenRouter, Snowflake Cortex AI and Vercel AI Gateway. The provider table lists model identifiers including `gpt-5.5` at OpenAI, `azure/gpt-5.5-2026-04-23` at Azure and `openai/gpt-5.5` at OpenRouter and Vercel. The same page marks the model status as active. (cloudprice.net) ### Where does GPT-5.5 sit in OpenAI’s current lineup? CloudPrice’s version history places GPT-5.5 above GPT-5.4 on price, with GPT-5.4 listed at $2.50 per 1 million input tokens and GPT-5.5 at $5.00. The same table shows GPT-5.4 Mini at $0.75 and GPT-5.4 Nano at $0.20 per 1 million input tokens, both with 1.1 million-token context windows. OpenAI’s API page likewise lists GPT-5.4 at $2.50 input and GPT-5.5 at $5.00 input. (cloudprice.net) ### What can users infer from the listed capabilities? CloudPrice says GPT-5.5 accepts text, image and PDF inputs and supports function calling, structured outputs, native JSON schema, web search and prompt caching. The page describes it as a GPT-5 series language model for “high-capability reasoning and generation tasks” at the “xhigh” performance tier. That description comes from CloudPrice’s catalog entry, not a standalone OpenAI launch post in the materials reviewed here. (cloudprice.net) ### What should readers watch next? OpenAI’s pricing pages now include GPT-5.5 in the flagship model lineup, and CloudPrice’s model page says its data was updated at 12:00 a.m. UTC on May 16, 2026. The next concrete changes to watch are provider-by-provider pricing updates, additional model variants such as GPT-5.5 Pro, and any new OpenAI documentation that narrows the difference between the 1.05 million and 1.1 million context figures. (cloudprice.net)