SIDE BY SIDE
Hermes 3 70B Instruct vs Hermes 4 405B
Both are Nous models. Hermes 4 405B was added to OpenRouter on 2025-08-26, Hermes 3 70B Instruct on 2024-08-18.
| Field | Hermes 3 70B Instruct | Hermes 4 405B |
|---|---|---|
| Provider | Nous | Nous |
| Family | Nous | Nous |
| Province | Blossom Valley | Blossom Valley |
| Context window | 131K tokens | 131K tokens |
| Maximum output | 16K tokens | 118K tokens |
| Input / 1M tokens | $0.700 | $1.00 |
| Output / 1M tokens | $0.700 | $3.00 |
| Accepts | text | text |
| Produces | text | text |
| Reasoning | No | Yes |
| Tool use | No | No |
| Added to OpenRouter | 2024-08-18 | 2025-08-26 |
| Model ID | nousresearch/hermes-3-llama-3.1-70b | nousresearch/hermes-4-405b |
Questions and answers
Which is cheaper, Hermes 3 70B Instruct or Hermes 4 405B?
Hermes 3 70B Instruct costs less for both input ($0.700 vs $1.00) and output ($0.700 vs $3.00) per million tokens. On input, Hermes 3 70B Instruct is 30% cheaper.
Which has the larger context window?
Both have a 131K-token context window.
What can one do that the other cannot?
Only Hermes 4 405B supports reasoning.
Answers are computed from the 2026-10-24 catalog snapshot.