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GPT-5.5 Pro

Chat Token‑based

OpenAI

openai/gpt-5.5-pro

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

Token‑based

~39.0 credits / msg

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File Support Reasoning 1050K Context Token-based Vision (OR)

About this model

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

Technical Specifications

Provider

OpenAI

Type

Chat

Context Window

1,050,000 tokens

Pricing

Token‑based

Knowledge Cutoff

2025-12-01

Capabilities

File Support

Can read PDF, DOCX, XLSX & more

Reasoning

Chain-of-thought reasoning exposed

1050K Context

Large context window for long documents

Token-based

Pay per input/output token

Vision (OR)

OpenRouter reports vision support