GPT 5.5
Review GPT 5.5 on key metrics including price, context length, throughput, and model features.
AuthorOpenAI
Context Length1.1M
Supports Tools
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.
Activity
Last 14 daysPrompt
19KCompletion
2KTotal
22KStartup
Startup
Latency (p50)2.46s
Throughput (p50)46.3 tok/s
Pricing
Input$2.50/M tokens
Output$15.00/M tokens
Cached input$0.25/M tokens
Features
Input Modalitiestext, image, file
Output Modalitiestext
Supported EndpointsChat Completions
Vision
Supports Tools