ReleasesMonday, September 28, 2026
Hermes Agent v0.21.5 Patch Drop
Patch release with ~460 merged PRs since v0.21.4. Improvements to Desktop plugin SDK, new interface mode, Connectors page, and expanded model support (GPT-6, Claude Opus 5.5). Update via `hermes update`.
Why it matters
Shows the velocity of the project and keeps the agent current with frontier models. Desktop SDK upgrades matter for anyone building custom UI surfaces.