Hermes 4 builds on our legacy of user-aligned models with expanded test-time compute capabilities. hermes4.nousresearch.com
Special attention was given to making the models creative and interesting to interact with, unencumbered by censorship, and neutrally aligned while maintaining state of the art level math, coding, and reasoning performance for open weight models.
You can try Hermes 4 in the new, revamped Nous Chat UI.
chat.nousresearch.com
Alongside these models, Nous Research releases a technical report that details the entirety of its creation process. https://arxiv.org/abs/2508.18255
The technical report includes a thorough set of evaluations of Hermes 4 and other popular LLMs, complete with the actual text-results of each test. We believe this report sets a new standard for transparency in benchmarking.