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Hermes 3 405B Instruct vs Reka Flash 3

Detailed technical comparison between Hermes 3 405B Instruct (Nous Research) and Reka Flash 3 (Reka 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 3 405B Instruct: 6 WinsvsReka Flash 3: 0 Wins
Context Leader

Hermes 3 405B Instruct

131,072 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Reka Flash 3

$0.10 / MTok
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 →
Reka AIactive

Reka Flash 3

Reka Flash 3 is a general-purpose, instruction-tuned large language model with 21 billion parameters, developed by Reka. It excels at general chat, coding tasks, instruction-following, and function calling. Featuring a...

View Reka Flash 3 Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationHermes 3 405B InstructReka Flash 3
ProviderNous ResearchReka AI
Context Window131,072 tokens🏆65,536 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelself hostablemanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2024-08-162025-03-12

API Pricing Comparison

Input Price per Million Tokens

Hermes 3 405B Instruct

$1.00

Reka Flash 3

$0.10

Output Price per Million Tokens

Hermes 3 405B Instruct

$1.00

Reka Flash 3

$0.20

💡 Cost Ratio: Reka Flash 3 is 10.0x cheaper per input token than Hermes 3 405B Instruct.

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
78.8%vs75.6%+3.2% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Reka Flash 3
HumanEvalPython coding & logic synthesis
77.0%vs68.4%+8.6% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Reka Flash 3
MATHComplex mathematical problem solving
54.2%vs41.6%+12.6% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Reka Flash 3
GPQAGraduate-level expert reasoning
39.6%vs29.0%+10.6% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Reka Flash 3
HellaSwagCommonsense reasoning and inference
81.8%vs76.2%+5.6% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Reka Flash 3
MT-BenchMulti-turn conversation flow quality
8.4%vs7.9%+0.6% Hermes 3 405B Instruct
Hermes 3 405B Instruct 🏆
Reka Flash 3

Hermes 3 405B Instruct Quirks & Gotchas

No developer gotchas reported.

Reka Flash 3 Quirks & Gotchas

No developer gotchas reported.

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