Aaron DefazioMember of Technical Staff · OpenAIResearcher↗
Researcher
OpenAIMember of Technical Staff
The Transformer uses attention to translate text while allowing faster training.
Reported GPT-4's capabilities, limitations and safety evaluations as a text-and-image input model.
Kaiser co-authored the Transformer, the design behind modern language AI, and co-built Tensor2Tensor, a library that helped researchers develop and share these models.
At OpenAI he helped lead research on o1, which learns to work through difficult problems before answering.
Based on public sources. If accuracy is important, verify details using the links or references.
For corrections, updates, or requests to remove information, contact us.
Reviewed July 23, 2026 · Checked for accuracy and new information.