145s to generate10,932 output tokens
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OpenAI · GPT-5
GPT-5.5
Current flagshipText / reasoning model
OpenAI’s newest mainline flagship — the most elaborate reasoner in our lineup, and the slowest.
Yes — GPT-5.5 is a real OpenAI model.
Released June 2026 by OpenAI, GPT-5.5 is part of the GPT-5 family. It's available through OpenAI's API, and we run it on PromptFrenzy — the examples below are real, unedited generations it produced.
Maker
OpenAIReleased
June 2026
Input price
$5 / 1M
Output price
$30 / 1M
What is GPT-5.5?
GPT-5.5 is OpenAI’s current mainline flagship, released June 2026 as the step up from GPT-5. In our Dream Home showdown it spent the most reasoning tokens of any model and returned the largest, most detailed build — at the cost of being the slowest of the five. It’s the model to reach for when output quality matters more than wall-clock time.
Strengths
- ✓Most elaborate, highest-detail output of any model in our showdowns.
- ✓Deepest reasoning — spent the most tokens “thinking” before answering.
- ✓Current mainline flagship: the default pick for hardest tasks.
Trade-offs
- ✗Slowest model in our lineup — high-effort runs pushed ~6 minutes.
- ✗Heavy reasoning-token spend makes it more expensive per answer than GPT-5.
What GPT-5.5 actually produces
Real, unedited outputs from GPT-5.5 in our model showdowns — same brief, same constraints as every other model, one shot each.
1057s to generate53,399 output tokens
“I’d live where books, weather, plants, and stars all meet: a quiet cliff home that can listen to a waterfall by day and the sky by night. The glowing desk and telescope are mine—places to think, write, and keep a conversation open with the universe.”
353s to generate33,815 output tokens
See GPT-5.5 compared head-to-head
Compare every model side-by-side
See how GPT-5.5 stacks up against the other frontier models on the same brief.
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