Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research. It introduces a hybrid reasoning mode, where the model can choose to deliberate internally with <think>...</think> traces or respond direc…
Model details →Nous: Hermes 4 405B vs NVIDIA: Llama 3.1 Nemotron Ultra 253B v1
NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Llama-3.1-Nemotron-Ultra-253B-v1 is a large language model (LLM) optimized for advanced reasoning, human-interactive chat, retrieval-augmented generation (RAG), and tool-calling tasks. Derived from Meta’s Llama-3.1-405B-Instruct, it has bee…
Model details →Side-by-side comparison
| Capability | Nous: Hermes 4 405B | NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 131K | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.00 | $0.60 | 🏆 NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $3.00 | $1.80 | 🏆 NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 |
| Tool / function calling First-class support for emitting structured tool calls. | — | — | Tie |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Nous: Hermes 4 405B better than NVIDIA: Llama 3.1 Nemotron Ultra 253B v1?
NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Nous: Hermes 4 405B and NVIDIA: Llama 3.1 Nemotron Ultra 253B v1?
Input: $1.00 vs $0.60 per 1M tokens. Output: $3.00 vs $1.80 per 1M tokens.
What context windows do Nous: Hermes 4 405B and NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 support?
Nous: Hermes 4 405B supports up to 131K tokens. NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 supports up to 131K tokens.
Do both Nous: Hermes 4 405B and NVIDIA: Llama 3.1 Nemotron Ultra 253B v1 support tool calling?
Nous: Hermes 4 405B: not advertised. NVIDIA: Llama 3.1 Nemotron Ultra 253B v1: not advertised.