GPT-5.5 Pro
VerifiedMultimodal model handling over a million tokens of context.
About GPT-5.5 Pro
GPT-5.5 Pro was developed as a proprietary multimodal system by OpenAI. It accepts file, image, and text modalities in a single context window of 1,050,000 tokens. The model remains closed-source with parameter count listed as unavailable.
Its design emphasizes unified handling of mixed input types over extended sequences. This enables processing of lengthy documents alongside visual and textual elements without external chunking. Typical usage includes research, content analysis, and complex retrieval tasks that benefit from large context capacity.
Capabilities
Best for
Long-form Document Analysis
The model excels at processing and reasoning over large volumes of text thanks to its extensive context window, making it ideal for reviewing comprehensive reports or datasets.
Multimodal Content Creation
It handles image understanding and file analysis alongside text generation, suitable for tasks like interpreting visual data and producing detailed summaries.
Complex Reasoning Tasks
Advanced capabilities in long-context reasoning allow it to tackle intricate problems that require integrating information from multiple sources.
Strengths & limitations
Strengths
- +Very large context window
- +Native support for files, images, and text
- +Seamless multimodal integration
- +Strong reasoning over extended inputs
Limitations
- –High resource use with maximum context
- –No audio or video modalities
- –Potential latency on very long inputs
Where to access GPT-5.5 Pro
Frequently asked questions
It supports up to 1050000 tokens for context.
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