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Hermes 3 405B Instruct vs Hermes 4 405B

Detailed technical comparison between Hermes 3 405B Instruct (Nous Research) and Hermes 4 405B (Nous Research). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.

⚡ Executive Summary & Verdict

Comparison Snapshot

Hermes 3 405B Instruct: 6 WinsvsHermes 4 405B: 0 Wins
Context Leader

Tie

Equal Capacity
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Tie

Equal Pricing
Nous Researchactive

Hermes 3 405B Instruct

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...

View Hermes 3 405B Instruct Full Specs →
Nous Researchactive

Hermes 4 405B

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...

View Hermes 4 405B Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationHermes 3 405B InstructHermes 4 405B
ProviderNous ResearchNous Research
Context Window131,072 tokens131,072 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelself hostablemanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2024-08-162025-08-26

API Pricing Comparison

Input Price per Million Tokens

Hermes 3 405B Instruct

$1.00

Hermes 4 405B

$1.00

Output Price per Million Tokens

Hermes 3 405B Instruct

$1.00

Hermes 4 405B

$3.00

💡 Cost Ratio: Both models offer identical input token pricing ($1.00 / MTok).

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Benchmark Performance Metrics

Standardized Scores (0–100%)

Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.

MMLUGeneral knowledge & multi-task understanding
78.8%vs78.6%+0.2% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Hermes 4 405B
HumanEvalPython coding & logic synthesis
77.0%vs76.8%+0.2% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Hermes 4 405B
MATHComplex mathematical problem solving
54.2%vs54.0%+0.2% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Hermes 4 405B
GPQAGraduate-level expert reasoning
39.6%vs39.4%+0.2% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Hermes 4 405B
HellaSwagCommonsense reasoning and inference
81.8%vs81.6%+0.2% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Hermes 4 405B
MT-BenchMulti-turn conversation flow quality
8.4%vs8.4%+0.0% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Hermes 4 405B

Hermes 3 405B Instruct Quirks & Gotchas

No developer gotchas reported.

Hermes 4 405B Quirks & Gotchas

No developer gotchas reported.

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