Hermes-4-405B
Hermes 4 405B is a frontier, hybrid-mode reasoning model based on Llama-3.1-405B by Nous Research that is aligned to you.
Params
405.9 B
Context
131,072
Downloads 30d
1 K
Likes
97
Download history
tracking started — chart appears after 7 days of snapshots (5 recorded)1 K downloads in the last 30 days
Can you run it?
Estimated VRAM at 8K context unless noted. Pick your hardware to see the verdict per quantization.
| File | Quant | Size | Est. VRAM | Verdict on RTX 4090 · 24 GB |
|---|---|---|---|---|
| model.safetensors | bf16 | 811.7 GB | 954.3 GB | ❌ Won’t fit |
| model.safetensors (bf16, full) | bf16 + 128K ctx | 811.7 GB | 1,867.4 GB | ❌ Won’t fit |
Estimate: file size × 1.1 + KV cache at 8K + 0.5 GB overhead. Not a benchmark — how we calculate this.
Run it
copy-paste, exact tags checked against the Hub$ curl -s https://aimodelscomparison.com/api/v1/models/hermes-4-405b
{
"hf_id": "NousResearch/Hermes-4-405B",
"params_b": 405.85,
"context_length": 131072,
"license": { "id": "llama3", "commercial": "conditional" },
"downloads_30d": 1216,
"vram_estimates": [
{ "quant": "bf16", "gb": 954.3 }
],
"updated_at": "2026-10-19T06:00:42Z"
}
Use via API
via OpenRouter · USD per 1M tokens · synced 2026-10-24$1.00
input / 1M
$3.00
output / 1M
—
cached input / 1M
$4.00
1M in + 1M out
- Context window
- 131,072 tokens
- Max output
- 117,964 tokens
- Providers
- 1
- Cheapest provider
- Nebius · $1.00 / $3.00
- Best throughput
- —
- AA Intelligence / Coding / Agentic
- 7.5 / — / —
✗ Tool calling
✓ Reasoning
✓ Structured outputs
✗ Image input
✗ File input
✗ Audio input
✗ Prompt caching
Specifications
- Architecture
- LlamaForCausalLM
- Parameters
- 405.9 B
- Tensor type
- BF16
- Context length
- 131,072
- Vocabulary
- 128,256
- Layers / heads
- 126 / 128
- Licence
- llama3
- First seen on the Hub
- 2025-08-06
- Training datasets
- undisclosed
- Added to our catalog
- 2026-10-20
Compare with any text-generation model