Nous: Hermes 3 405B Instruct
NOUSRESEARCH Developer Architecture Profile
Intelligence (ELO)1300Chatbot Arena Verified
Max Context131,072Tokens
API Cost / 1M$2.00Blended Prompt + Completion
Model Capabilities
- Coding & Logic
- Roleplay
- Fictional
- Classification
- Conversational
Hermes 3 is a generalist language model with many improvements over Hermes 2, including advanced agentic capabilities, much better roleplaying, reasoning, multi-turn conversation, long context coherence, and improvements across the board.
Hermes 3 405B is a frontier-level, full-parameter finetune of the Llama-3.1 405B foundation model, focused on aligning LLMs to the user, with powerful steering capabilities and control given to the end user.
The Hermes 3 series builds and expands on the Hermes 2 set of capabilities, including more powerful and reliable function calling and structured output capabilities, generalist assistant capabilities, and improved code generation skills.
Hermes 3 is competitive, if not superior, to Llama-3.1 Instruct models at general capabilities, with varying strengths and weaknesses attributable between the two.
Granular Pricing Matrix
Input Tokens (Prompt)$1.00 / 1M
Output Tokens (Completion)$1.00 / 1M
Pricing data via OpenRouter. Sync: 3/16/2026
Evaluate Competitors
VS Engine MatchupNous: Hermes 3 405B Instruct vs Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)VS Engine MatchupNous: Hermes 3 405B Instruct vs Google: Gemini 3.1 Pro Preview Custom ToolsVS Engine MatchupNous: Hermes 3 405B Instruct vs OpenAI: GPT-5.2-CodexVS Engine MatchupNous: Hermes 3 405B Instruct vs Google: Gemini 3 Flash PreviewVS Engine MatchupNous: Hermes 3 405B Instruct vs OpenAI: GPT-5.2 ProVS Engine MatchupNous: Hermes 3 405B Instruct vs OpenAI: GPT-5.2