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Claude Fable 5 vs Hermes 3 405B Instruct

Detailed technical comparison between Claude Fable 5 (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.

โšก Executive Summary & Verdict

Comparison Snapshot

Claude Fable 5: 3 WinsvsHermes 3 405B Instruct: 3 Wins
Context Leader

Claude Fable 5

1,000,000 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 Fable 5

Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...

View Claude Fable 5 Full Specs โ†’
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 โ†’

Technical Specifications

๐Ÿ† = Superior Spec
SpecificationClaude Fable 5Hermes 3 405B Instruct
ProviderAnthropicNous Research
Context Window1,000,000 tokens๐Ÿ†131,072 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apiself hostable
Production Stabilitybetastable
API AvailableYesYes
Released Date2026-06-092024-08-16

API Pricing Comparison

Input Price per Million Tokens

Claude Fable 5

$10.00

Hermes 3 405B Instruct

$1.00

Output Price per Million Tokens

Claude Fable 5

$50.00

Hermes 3 405B Instruct

$1.00

๐Ÿ’ก Cost Ratio: Hermes 3 405B Instruct is 10.0x cheaper per input token than Claude Fable 5.

Want to test both models live?

Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.

Benchmark Performance Metrics

Standardized Scores (0โ€“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
81.2%vs78.8%+2.4% Claude Fable 5
Claude Fable 5 ๐Ÿ†
Hermes 3 405B Instruct
HumanEvalPython coding & logic synthesis
79.4%vs77.0%+2.4% Claude Fable 5
Claude Fable 5 ๐Ÿ†
Hermes 3 405B Instruct
MATHComplex mathematical problem solving
56.6%vs54.2%+2.4% Claude Fable 5
Claude Fable 5 ๐Ÿ†
Hermes 3 405B Instruct
GPQAGraduate-level expert reasoning
38.6%vs39.6%+1.0% Hermes 3 405B Instruct
Claude Fable 5
Hermes 3 405B Instruct ๐Ÿ†
HellaSwagCommonsense reasoning and inference
80.8%vs81.8%+1.0% Hermes 3 405B Instruct
Claude Fable 5
Hermes 3 405B Instruct ๐Ÿ†
MT-BenchMulti-turn conversation flow quality
8.3%vs8.4%+0.1% Hermes 3 405B Instruct
Claude Fable 5
Hermes 3 405B Instruct ๐Ÿ†

Claude Fable 5 Quirks & Gotchas

No developer gotchas reported.

Hermes 3 405B Instruct Quirks & Gotchas

No developer gotchas reported.

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