← Back to Model Hub/SIDE-BY-SIDE REVIEW
SHARE THIS:

Claude Fable 5 vs Nemotron 3 Ultra

Detailed technical comparison between Claude Fable 5 (Anthropic) and Nemotron 3 Ultra (Nvidia). 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 Fable 5: 0 WinsvsNemotron 3 Ultra: 6 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

Nemotron 3 Ultra

$0.50 / 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 →
Nvidiaactive

Nemotron 3 Ultra

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

View Nemotron 3 Ultra Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationClaude Fable 5Nemotron 3 Ultra
ProviderAnthropicNvidia
Context Window1,000,000 tokens🏆512,288 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apimanaged api
Production Stabilitybetabeta
API AvailableYesYes
Released Date2026-06-092026-06-04

API Pricing Comparison

Input Price per Million Tokens

Claude Fable 5

$10.00

Nemotron 3 Ultra

$0.50

Output Price per Million Tokens

Claude Fable 5

$50.00

Nemotron 3 Ultra

$2.20

💡 Cost Ratio: Nemotron 3 Ultra is 20.0x 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.

Open Live Sandbox Playground →

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
81.2%vs87.8%+6.6% Nemotron 3 Ultra
Claude Fable 5
Nemotron 3 Ultra 🏆
HumanEvalPython coding & logic synthesis
79.4%vs87.0%+7.6% Nemotron 3 Ultra
Claude Fable 5
Nemotron 3 Ultra 🏆
MATHComplex mathematical problem solving
56.6%vs68.2%+11.6% Nemotron 3 Ultra
Claude Fable 5
Nemotron 3 Ultra 🏆
GPQAGraduate-level expert reasoning
38.6%vs49.6%+11.0% Nemotron 3 Ultra
Claude Fable 5
Nemotron 3 Ultra 🏆
HellaSwagCommonsense reasoning and inference
80.8%vs85.4%+4.6% Nemotron 3 Ultra
Claude Fable 5
Nemotron 3 Ultra 🏆
MT-BenchMulti-turn conversation flow quality
8.3%vs9.1%+0.8% Nemotron 3 Ultra
Claude Fable 5
Nemotron 3 Ultra 🏆

Claude Fable 5 Quirks & Gotchas

No developer gotchas reported.

Nemotron 3 Ultra Quirks & Gotchas

No developer gotchas reported.

Explore Other Popular Comparisons

SIDE-BY-SIDE REVIEW

Claude Fable 5 vs Nano Banana 2 (Gemini 3.1 Flash Image)

Compare context windows, live API token prices, and benchmark scores.

SIDE-BY-SIDE REVIEW

Claude Fable 5 vs GLM 4.7 Flash

Compare context windows, live API token prices, and benchmark scores.

SIDE-BY-SIDE REVIEW

Claude Fable 5 vs GLM 5.2

Compare context windows, live API token prices, and benchmark scores.

SIDE-BY-SIDE REVIEW

Claude Fable 5 vs GPT-5.2-Codex

Compare context windows, live API token prices, and benchmark scores.

SIDE-BY-SIDE REVIEW

Claude Fable 5 vs DeepSeek V3.1

Compare context windows, live API token prices, and benchmark scores.

SIDE-BY-SIDE REVIEW

Claude Fable 5 vs Mistral Medium 3.1

Compare context windows, live API token prices, and benchmark scores.