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Nous: Hermes 3 405B Instruct (free)
💰 Budget ClassOpen WeightsDEVELOPED BY: Nousresearch • LAST UPDATED: 7/4/2026
CCI (Capability)51.4Consensus: Contested ⚠
Context Window131,072Max token length
In/Out PricingFreeBlended cost/1M: $0.00
Pulse (Popularity)64/100Adoption + discussion proxy
Model Description
OpenRouter model gateway for Nous: Hermes 3 405B Instruct (free).
Domain Averages
Reasoning55.8%
Coding50.2%
Math29.1%
Preference70.6%
Jury & Benchmark Signals
| Source / Harness | Score |
|---|---|
| GPQA-Diamond | 51% |
| Humanity's Last Exam | 48% |
| MMLU-Pro | 83% |
| SWE-bench Verified | 35% |
| LiveCodeBench | 42% |
| AIME | 35% |
| LMArena style-controlled Elo | 1240 |
Consensus Discrepancy (Spread: 41.5 pts)
Source
Normalized
CCI Dev.
GPQA-Diamond
48.9
-2.5
Humanity's Last Exam
53.4
+2
MMLU-Pro
65.2
+13.8
SWE-bench Verified
49.8
-1.6
LiveCodeBench
50.6
-0.8
AIME
29.1
-22.3
LMArena style-controlled Elo
70.6
+19.2
Supported Modalities
INPUT:
text
OUTPUT:
text
Search Tags
#text#open-weight#reasoning
How to Use This Model
Python SDK Integration:
import openai
client = openai.OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_OPENROUTER_KEY"
)
response = client.chat.completions.create(
model="nousresearch/hermes-3-llama-3.1-405b_free",
messages=[
{"role": "user", "content": "Explain quantum entanglement in 1 sentence."}
]
)cURL Terminal Request:
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "nousresearch/hermes-3-llama-3.1-405b_free",
"messages": [
{"role": "user", "content": "Hello!"}
]
}'Community Debates & Mentions (0)
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