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Claude Opus 4.1 vs Hermes 3 405B Instruct

Detailed technical comparison between Claude Opus 4.1 (Anthropic) 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

Claude Opus 4.1: 6 WinsvsHermes 3 405B Instruct: 0 Wins
Context Leader

Claude Opus 4.1

200,000 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Hermes 3 405B Instruct

$1.00 / MTok
Anthropicactive

Claude Opus 4.1

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...

View Claude Opus 4.1 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
SpecificationClaude Opus 4.1Hermes 3 405B Instruct
ProviderAnthropicNous Research
Context Window200,000 tokens🏆131,072 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apiself hostable
Production Stabilitystablestable
API AvailableYesYes
Released Date2025-08-052024-08-16

API Pricing Comparison

Input Price per Million Tokens

Claude Opus 4.1

$15.00

Hermes 3 405B Instruct

$1.00

Output Price per Million Tokens

Claude Opus 4.1

$75.00

Hermes 3 405B Instruct

$1.00

💡 Cost Ratio: Hermes 3 405B Instruct is 15.0x cheaper per input token than Claude Opus 4.1.

Want to test both models live?

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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
91.4%vs78.8%+12.6% Claude Opus 4.1
Claude Opus 4.1 🏆
Hermes 3 405B Instruct
HumanEvalPython coding & logic synthesis
92.6%vs77.0%+15.6% Claude Opus 4.1
Claude Opus 4.1 🏆
Hermes 3 405B Instruct
MATHComplex mathematical problem solving
79.8%vs54.2%+25.6% Claude Opus 4.1
Claude Opus 4.1 🏆
Hermes 3 405B Instruct
GPQAGraduate-level expert reasoning
58.2%vs39.6%+18.6% Claude Opus 4.1
Claude Opus 4.1 🏆
Hermes 3 405B Instruct
HellaSwagCommonsense reasoning and inference
90.4%vs81.8%+8.6% Claude Opus 4.1
Claude Opus 4.1 🏆
Hermes 3 405B Instruct
MT-BenchMulti-turn conversation flow quality
9.3%vs8.4%+0.9% Claude Opus 4.1
Claude Opus 4.1 🏆
Hermes 3 405B Instruct

Claude Opus 4.1 Quirks & Gotchas

No developer gotchas reported.

Hermes 3 405B Instruct Quirks & Gotchas

No developer gotchas reported.

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