Nous Research released Hermes Agent 0.23.1, a patch release, on GitHub on 9 November. Hermes Agent is Nous’s open-source AI agent, a program that carries out tasks using a language model. The release notes say the version rolls up about 618 pull requests merged since 0.23.0 into a stable release. It ships to the CLI, the installers, the Microsoft Store app, Docker and Hermes Cloud.

Hermes fetches its plugin catalogue from the web, and the hermes plugins install command looks up plugins in it. When Nous updated the catalogue’s site on 9 November, the catalogue file grew beyond 2 MiB. Installs do not accept a larger file, so every install silently fell back to the catalogue that shipped with its version.

As a result, the command could not find plugins added since the user’s last update, the release notes say. It also installed the pinned plugin version that shipped with the user’s Hermes version instead of the current one, and ignored newer removal entries in the catalogue.

Version 0.23.1 raises the cap to 16 MiB. Versions 0.23.0 and older keep using the old catalogue until they are updated. The CLI updates with hermes update, and the Microsoft Store app through the Store. On Docker and Hermes Cloud, the release is in the Docker image nousresearch/hermes-agent:stable. The Desktop app installed from the installer (.exe or .dmg) does not update in this release, only with the next full release.

The release notes deliberately leave out other changes, such as cancelling with the Esc key in the text interface and new plugin APIs. Full release notes are promised for version 0.24.0.

Cloud agents open in the browser

Nous Research said on X the same day that Hermes Cloud agents now open in a browser tab with the same interface as the Hermes Desktop app. Users create an agent in Nous Portal by choosing a name and a model. Nous hosts the agent in a separate container around the clock, so it can run scheduled tasks and reply in messaging channels even when the user’s computer is off.

Chats, group chats, plugins and settings work in the browser as they do on a local machine, the company said. Users can also use the agent on a phone or connect Hermes Desktop to it.

The Plus, Super and Ultra plans ($20, $100 and $200 a month) include one cloud agent. On Plus the agent has up to 4 GB of memory and 25 GB of disk space; on Ultra, 8 GB and 100 GB. Without a plan, setting up an agent requires a balance of at least $2. The service’s page says the instance is charged daily to the Nous balance based on actual usage, and inference (running the model) and tools are billed separately.

Fable 5.2 also available with a Claude subscription

Teknium of Nous Research said on X on 9 November that the new Fable 5.2 model is available in Hermes Agent through Nous Portal and OpenRouter, and with a Claude subscription.