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Gemini 3.1 Pro Preview Custom Tools vs Hermes 3 405B Instruct

Detailed technical comparison between Gemini 3.1 Pro Preview Custom Tools (Google) and Hermes 3 405B Instruct (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

Gemini 3.1 Pro Preview Custom Tools: 6 WinsvsHermes 3 405B Instruct: 0 Wins
Context Leader

Gemini 3.1 Pro Preview Custom Tools

1,048,576 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Hermes 3 405B Instruct

$1.00 / MTok
Googleactive

Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...

View Gemini 3.1 Pro Preview Custom Tools Full Specs →
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 →

Technical Specifications

🏆 = Superior Spec
SpecificationGemini 3.1 Pro Preview Custom ToolsHermes 3 405B Instruct
ProviderGoogleNous Research
Context Window1,048,576 tokens🏆131,072 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apiself hostable
Production Stabilitybetastable
API AvailableYesYes
Released Date2026-02-252024-08-16

API Pricing Comparison

Input Price per Million Tokens

Gemini 3.1 Pro Preview Custom Tools

$2.00

Hermes 3 405B Instruct

$1.00

Output Price per Million Tokens

Gemini 3.1 Pro Preview Custom Tools

$12.00

Hermes 3 405B Instruct

$1.00

💡 Cost Ratio: Hermes 3 405B Instruct is 2.0x cheaper per input token than Gemini 3.1 Pro Preview Custom Tools.

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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
86.8%vs78.8%+8.0% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
Hermes 3 405B Instruct
HumanEvalPython coding & logic synthesis
86.0%vs77.0%+9.0% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
Hermes 3 405B Instruct
MATHComplex mathematical problem solving
67.2%vs54.2%+13.0% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
Hermes 3 405B Instruct
GPQAGraduate-level expert reasoning
48.6%vs39.6%+9.0% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
Hermes 3 405B Instruct
HellaSwagCommonsense reasoning and inference
87.8%vs81.8%+6.0% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
Hermes 3 405B Instruct
MT-BenchMulti-turn conversation flow quality
9.0%vs8.4%+0.6% Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools 🏆
Hermes 3 405B Instruct

Gemini 3.1 Pro Preview Custom Tools Quirks & Gotchas

No developer gotchas reported.

Hermes 3 405B Instruct Quirks & Gotchas

No developer gotchas reported.

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