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Hermes 4 405B vs Nemotron 3 Ultra

Detailed technical comparison between Hermes 4 405B (Nous Research) and Nemotron 3 Ultra (Nvidia). 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 4 405B: 0 WinsvsNemotron 3 Ultra: 6 Wins
Context Leader

Nemotron 3 Ultra

512,288 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Nemotron 3 Ultra

$0.50 / MTok
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 →
Nvidiaactive

Nemotron 3 Ultra

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

View Nemotron 3 Ultra Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationHermes 4 405BNemotron 3 Ultra
ProviderNous ResearchNvidia
Context Window131,072 tokens512,288 tokens🏆
Agent SuitabilityNot yet benchmarkedNot yet benchmarked
Time to First Token (TTFT)No public TTFT dataNo public TTFT data
Deployment Modelmanaged apimanaged api
Production StabilityStable GA (est.)Beta Access (est.)
API AvailableYesYes
Released Date2025-08-262026-06-04

API Pricing Comparison

Input Price per Million Tokens

Hermes 4 405B

$1.00

Nemotron 3 Ultra

$0.50

Output Price per Million Tokens

Hermes 4 405B

$3.00

Nemotron 3 Ultra

$2.20

💡 Cost Ratio: Nemotron 3 Ultra is 2.0x cheaper per input token than Hermes 4 405B.

Want to test both models live?

Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.

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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
78.6%vs87.8%+9.2% Nemotron 3 Ultra
Hermes 4 405B
Nemotron 3 Ultra 🏆
HumanEvalPython coding & logic synthesis
76.8%vs87.0%+10.2% Nemotron 3 Ultra
Hermes 4 405B
Nemotron 3 Ultra 🏆
MATHComplex mathematical problem solving
54.0%vs68.2%+14.2% Nemotron 3 Ultra
Hermes 4 405B
Nemotron 3 Ultra 🏆
GPQAGraduate-level expert reasoning
39.4%vs49.6%+10.2% Nemotron 3 Ultra
Hermes 4 405B
Nemotron 3 Ultra 🏆
HellaSwagCommonsense reasoning and inference
81.6%vs85.4%+3.8% Nemotron 3 Ultra
Hermes 4 405B
Nemotron 3 Ultra 🏆
MT-BenchMulti-turn conversation flow quality
8.4%vs9.1%+0.7% Nemotron 3 Ultra
Hermes 4 405B
Nemotron 3 Ultra 🏆

Hermes 4 405B Quirks & Gotchas

No developer gotchas reported.

Nemotron 3 Ultra Quirks & Gotchas

No developer gotchas reported.

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