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GPT-5.5API
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.
Prices update automatically — checked daily against provider list prices.
- $11.25 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 8% of the 226 commercial models tracked here
- 85 of 101 OpenAI models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for GPT-5.5, measured by Artificial Analysis. Higher is better. Measurement mode: Xhigh.
About this model
GPT-5.5 is a commercial AI model by OpenAI. The specifications below are tracked automatically: pricing is refreshed daily from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is GPT-5.5?
GPT-5.5 is an AI language model from OpenAI. It is a proprietary model, available through an API.
Is GPT-5.5 free?
GPT-5.5 is not free: it costs $5 per million input tokens and $30 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is GPT-5.5 good at?
Independent benchmarks from Artificial Analysis give it GPQA 93.5%, Humanity's Last Exam 45.8%, Long Context Reasoning 84.3%, SciCode 55.8%, IFBench 75.9%, τ²-Bench 93.9%, τ-Bench Banking 39%, Terminal-Bench 84.3%, Terminal-Bench Hard 60.6%. It is particularly used for code generation.