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Hermes 4 405B vs Mistral Small 3

Detailed technical comparison between Hermes 4 405B (Nous Research) and Mistral Small 3 (Mistral). 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: 1 WinvsMistral Small 3: 5 Wins
Context Leader

Hermes 4 405B

131,072 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Mistral Small 3

$0.10 / 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 →
Mistralactive

Mistral Small 3

Mistral Small 3 is a 24B-parameter language model optimized for low-latency performance across common AI tasks. Released under the Apache 2.0 license, it features both pre-trained and instruction-tuned versions designed...

View Mistral Small 3 Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationHermes 4 405BMistral Small 3
ProviderNous ResearchMistral
Context Window131,072 tokens🏆32,768 tokens
Agent SuitabilityNot yet benchmarked84/100 (est.)
Time to First Token (TTFT)No public TTFT data120 ms (est.)
Deployment Modelmanaged apimanaged api
Production StabilityStable GA (est.)Stable GA (est.)
API AvailableYesYes
Released Date2025-08-262025-01-30

API Pricing Comparison

Input Price per Million Tokens

Hermes 4 405B

$1.00

Mistral Small 3

$0.10

Output Price per Million Tokens

Hermes 4 405B

$3.00

Mistral Small 3

$0.30

💡 Cost Ratio: Mistral Small 3 is 10.0x cheaper per input token than Hermes 4 405B.

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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%vs81.2%+2.6% Mistral Small 3
Hermes 4 405B
Mistral Small 3 🏆
HumanEvalPython coding & logic synthesis
76.8%vs83.0%+6.2% Mistral Small 3
Hermes 4 405B
Mistral Small 3 🏆
MATHComplex mathematical problem solving
54.0%vs68.0%+14.0% Mistral Small 3
Hermes 4 405B
Mistral Small 3 🏆
GPQAGraduate-level expert reasoning
39.4%vs45.0%+5.6% Mistral Small 3
Hermes 4 405B
Mistral Small 3 🏆
HellaSwagCommonsense reasoning and inference
81.6%vs85.0%+3.4% Mistral Small 3
Hermes 4 405B
Mistral Small 3 🏆
MT-BenchMulti-turn conversation flow quality
8.4%vs8.3%+0.1% Hermes 4 405B
Hermes 4 405B 🏆
Mistral Small 3

Hermes 4 405B Quirks & Gotchas

No developer gotchas reported.

Mistral Small 3 Quirks & Gotchas

  • ▸Fastest TTFT at lowest cost — ideal for high-volume classification
  • ▸Not designed for complex reasoning — route multi-step tasks to Mistral Large 3

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