GPT-5.5
2026 large language model by OpenAI
From Wikipedia, the free encyclopedia
GPT-5.5 (Generative Pre-trained Transformer 5.5) is a large language model (LLM) released by OpenAI on April 23, 2026.[1][2] The model is also known by its codename "Spud".[3]
| GPT-5.5 | |
|---|---|
| |
| Developer | OpenAI |
| Initial release | April 23, 2026 |
| Predecessor | GPT-5.4 |
| License | Proprietary |
| Website | openai |
OpenAI reports improvements on benchmarks like Terminal-Bench 2.0 (82.7%) and FrontierMath (1-3: 51.7%, 4: 35.4%) over other popular models from the competition like Claude Opus 4.7 and Gemini 3.1 Pro.[4][5]