GPT-5.5
OpenAI· released 24 Apr 2026
openai/gpt-5.5- Input / 1M tokens
- $5
- Output / 1M tokens
- $30
Longest answer: 128K tokens
About
GPT-5.5 is a text-output model from OpenAI for complex professional workloads, with reasoning, tool support, and vision. It accepts file, image, and text inputs. Its context window is 1,050,000 tokens, and it can produce up to 128,000 tokens. The listed summary says it builds on GPT-5.4 and describes stronger reasoning, higher reliability, and improved token efficiency on hard tasks. The model ID is openai/gpt-5.5. OpenAI is both maker and lab, and openai is its family. It was released on 2026-04-24. Input costs USD 5 per 1M tokens, and output costs USD 30 per 1M tokens. Its official listing is at https://openrouter.ai/openai/gpt-5.5.
Who it is for
GPT-5.5 may suit teams with professional workloads involving text, images, or files, and tasks that call for reasoning or tool support. Its large context window and 128,000-token output limit may be useful where long inputs or outputs are required.
What is good
- Accepts file, image, and text inputs
- Reasoning, vision, and tools are supported
- 1,050,000-token context window
- Maximum output of 128,000 tokens
What to know first
- Output costs USD 30 per 1M tokens
- Input costs USD 5 per 1M tokens
Verdict
GPT-5.5 accepts three input types and combines reasoning, vision, and tool support with a 1,050,000-token context window. Its listed output price is USD 30 per 1M tokens.
Details
- Lab
- OpenAIopenrouter.ai · 3 Oct 2026
- Context
- 1,050Kopenrouter.ai · 3 Oct 2026
- Input price
- $5 / 1Mopenrouter.ai · 3 Oct 2026
- Output price
- $30 / 1Mopenrouter.ai · 3 Oct 2026
- Max output
- 128,000 tokensopenrouter.ai · 3 Oct 2026
- Inputs
- file, image, textopenrouter.ai · 3 Oct 2026
- Open weights
- Noopenrouter.ai · 3 Oct 2026
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Sources
- openrouter.ai/openai/gpt-5.5· checked 3 Oct 2026