# Hermes 4 - Llama-3.1 405B release · 2025-08-27 · snapshot 2026-10-27

Creator: Nous Research · 2 effort levels

| Effort level | Input modalities | Intelligence | Total cost | E2E | On the frontier today | ID |
|---|---|---|---|---|---|---|
| Hermes 4 - Llama-3.1 405B (Non-reasoning) | Text | 7.40 | - | 13.8s | no | `hermes-4-llama-3-1-405b` |
| Hermes 4 - Llama-3.1 405B (Reasoning) | Text | 7.50 | - | 61.3s | no | `hermes-4-llama-3-1-405b-reasoning` |

Open weights · on the open-weights frontier today: 0 of 2


> Metrics snapshot: 2026-10-27T09:34:39Z. Intelligence index version: unknown. Release timeline, frontier age, release impact and shakeup cards are reconstructions using one selected snapshot's metrics, not a record of what was known at release. Scores, benchmark cost and derived value may change when the index methodology changes. Source documentation advertises v4.3.2; API correspondence is unverified.