Summary
- Not yet tested on the current verification suite; speed, latency and price below are measured.
- Starts responding after 33.8 s (median time to first token), including thinking time.
OpenAIReleased 24 Apr 2026
openai/gpt-5.5-proPeer group: 34 models with a blended list price over $1 per 1M tokens (3 input : 1 output). Charts below compare GPT-5.5 Pro with all models; cost and speed charts focus on this peer group.
Verification score: the share of 80 questions from open datasets answered correctly. See the benchmark datasets.
GPT-5.5 Pro circled; dashed line joins models no cheaper model beats
GPT-5.5 Pro circled · accurate and quick sits top left
GPT-5.5 Pro circled · output tokens, reasoning included
All models tested on the current suite
Average cost of one question, split into input, reasoning and answer tokens at each model's list price. Reasoning tokens are billed as output.
Peer group: blended price over $1
All models · lower is better
Median of 3 streamed runs of the same prompt, measured 25 Oct 2026.
Peer group (over $1) · higher is better
Peer group (over $1) · lower is better
Peer group (over $1) · lower is better
GPT-5.5 Pro circled · quick to start and fast sits top left
Questions answered correctly in each category
Not yet tested on the current verification suite.
Every host serving this model through OpenRouter, from OpenRouter's catalogue
| Host | Input / 1M | Output / 1M | Context | Max output | Quantization |
|---|---|---|---|---|---|
| OpenAI | $15 | $90 | 1.1M | 128k | — |
Scores, speed and billed cost are our own measurements. Prices, context window and hosts come from OpenRouter's catalogue on the test date.