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Hermes 4 405B vs Kimi K3

Detailed technical comparison between Hermes 4 405B (Nous Research) and Kimi K3 (Moonshot AI). 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 WinsvsKimi K3: 0 Wins
Context Leader

Kimi K3

1,048,576 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Hermes 4 405B

$1.00 / 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 →
Moonshot AIactive

Kimi K3

Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI. It is suited for complex coding, knowledge work, and long-horizon agentic workflows, and is particularly strong at...

View Kimi K3 Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationHermes 4 405BKimi K3
ProviderNous ResearchMoonshot AI
Context Window131,072 tokens1,048,576 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 Date2025-08-262026-07-16

API Pricing Comparison

Input Price per Million Tokens

Hermes 4 405B

$1.00

Kimi K3

$3.00

Output Price per Million Tokens

Hermes 4 405B

$3.00

Kimi K3

$15.00

💡 Cost Ratio: Hermes 4 405B is 3.0x cheaper per input token than Kimi K3.

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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%vs78.6%+0.0% Kimi K3
Hermes 4 405B
Kimi K3
HumanEvalPython coding & logic synthesis
76.8%vs76.8%+0.0% Kimi K3
Hermes 4 405B
Kimi K3
MATHComplex mathematical problem solving
54.0%vs54.0%+0.0% Kimi K3
Hermes 4 405B
Kimi K3
GPQAGraduate-level expert reasoning
39.4%vs39.4%+0.0% Kimi K3
Hermes 4 405B
Kimi K3
HellaSwagCommonsense reasoning and inference
81.6%vs81.6%+0.0% Kimi K3
Hermes 4 405B
Kimi K3
MT-BenchMulti-turn conversation flow quality
8.4%vs8.4%+0.0% Kimi K3
Hermes 4 405B
Kimi K3

Hermes 4 405B Quirks & Gotchas

No developer gotchas reported.

Kimi K3 Quirks & Gotchas

No developer gotchas reported.

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