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Claude Opus 4.8 (Fast) vs Nemotron 3 Ultra

Detailed technical comparison between Claude Opus 4.8 (Fast) (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 Opus 4.8 (Fast): 6 WinsvsNemotron 3 Ultra: 0 Wins
Context Leader

Claude Opus 4.8 (Fast)

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 Opus 4.8 (Fast)

Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

View Claude Opus 4.8 (Fast) 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 Opus 4.8 (Fast)Nemotron 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 Date2026-05-272026-06-04

API Pricing Comparison

Input Price per Million Tokens

Claude Opus 4.8 (Fast)

$10.00

Nemotron 3 Ultra

$0.50

Output Price per Million Tokens

Claude Opus 4.8 (Fast)

$50.00

Nemotron 3 Ultra

$2.20

💡 Cost Ratio: Nemotron 3 Ultra is 20.0x cheaper per input token than Claude Opus 4.8 (Fast).

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.

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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
92.6%vs87.8%+4.8% Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) 🏆
Nemotron 3 Ultra
HumanEvalPython coding & logic synthesis
93.8%vs87.0%+6.8% Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) 🏆
Nemotron 3 Ultra
MATHComplex mathematical problem solving
81.0%vs68.2%+12.8% Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) 🏆
Nemotron 3 Ultra
GPQAGraduate-level expert reasoning
59.4%vs49.6%+9.8% Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) 🏆
Nemotron 3 Ultra
HellaSwagCommonsense reasoning and inference
91.6%vs85.4%+6.2% Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) 🏆
Nemotron 3 Ultra
MT-BenchMulti-turn conversation flow quality
9.4%vs9.1%+0.3% Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) 🏆
Nemotron 3 Ultra

Claude Opus 4.8 (Fast) Quirks & Gotchas

No developer gotchas reported.

Nemotron 3 Ultra Quirks & Gotchas

No developer gotchas reported.

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