API cost decision in 10 seconds

Nemotron 3 Ultra vs Grok Build 0.1

Pick Grok Build 0.1 for lower cost; pick Nemotron 3 Ultra only if the larger context window matters more.

Page updated:  Data confirmed:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Grok Build 0.1 for lower cost; pick Nemotron 3 Ultra only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Grok Build 0.1 is estimated at $2 vs $2.4 for Nemotron 3 Ultra, saving $0.4 (16.7% lower).

Cost-first pickGrok Build 0.1
Context-first pickNemotron 3 Ultra
Sample savings$0.416.7%
10x traffic gap$4

Nemotron 3 Ultra has more context, but Grok Build 0.1 saves $0.4 on the standard workload. At 10x that traffic, the same price gap is about $4. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors Nemotron 3 Ultra, balanced workload favors Grok Build 0.1, and output-heavy chatbot favors Grok Build 0.1.

Workload shapeToken mixBetter pickNemotron 3 UltraGrok Build 0.1
Input-heavy / RAG5M input + 500K outputNemotron 3 Ultra$4.8$6
Balanced workload1M input + 1M outputGrok Build 0.1$4.2$3
Output-heavy chatbot1M input + 5M outputGrok Build 0.1$18.6$11
Cheaper input Nemotron 3 Ultra $0.6 vs $1 / 1M

Nemotron 3 Ultra is $0.4 cheaper per 1M input tokens (40% lower; 1.67x difference).

Cheaper output Grok Build 0.1 $3.6 vs $2 / 1M

Grok Build 0.1 is $1.6 cheaper per 1M output tokens (44.4% lower; 1.8x difference).

Larger context Nemotron 3 Ultra 512.29K vs 256K

Nemotron 3 Ultra has 256.29K more context (2x larger).

Sample workload Grok Build 0.1 $2.4 vs $2

Grok Build 0.1 is $0.4 cheaper on the standard workload (16.7% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Nemotron 3 Ultra Calculating… Estimated API cost
Grok Build 0.1 Calculating… Estimated API cost
Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Nemotron 3 Ultra has the lower input price; Grok Build 0.1 has the lower output price; Nemotron 3 Ultra offers the larger context window. For the 1M input plus 500K output sample, Grok Build 0.1 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $2.4 for Nemotron 3 Ultra and $2 for Grok Build 0.1.

Best Fit

Choose Nemotron 3 Ultra when you care most about lower input-token price, and larger context window.

Choose Grok Build 0.1 when you care most about lower output-token price.

Decision Notes
  • On the standard 1M input plus 500K output workload, Grok Build 0.1 is estimated at $2 vs $2.4 for Nemotron 3 Ultra, saving $0.4 (16.7% lower).
  • Grok Build 0.1 is $0.4 cheaper on the standard workload (16.7% lower).
  • Nemotron 3 Ultra is $0.4 cheaper per 1M input tokens (40% lower; 1.67x difference).
  • Grok Build 0.1 is $1.6 cheaper per 1M output tokens (44.4% lower; 1.8x difference).
  • Nemotron 3 Ultra has 256.29K more context (2x larger).
Head-to-Head Specs
FeatureNemotron 3 Ultra
(NVIDIA)
Grok Build 0.1
(xAI)
Input Price
prompt tokens per 1M
$0.6$1
Completion Price
per 1M tokens
$3.6$2
Sample Workload Cost
1M input + 500K output
$2.4$2
Context Window512.29K256K
Release Date
Popularity#91#137

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGrok Build 0.1On the standard 1M input plus 500K output workload, Grok Build 0.1 is estimated at $2 vs $2.4 for Nemotron 3 Ultra, saving $0.4 (16.7% lower).
High-volume input processingNemotron 3 UltraLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsGrok Build 0.1Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workNemotron 3 UltraA larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Larger context near this budget
  • Grok 4.20 offers 2M context with $2.5 sample workload cost.
  • Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
  • Llama 4 Scout offers 1.31M context with $0.25 sample workload cost.
  • MiMo-V2.5 offers 1.05M context with $0.28 sample workload cost.

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

Open cheapest models

Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

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NVIDIA catalog

Review all tracked NVIDIA models before deciding whether this matchup is the right shortlist.

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xAI catalog

Check other xAI models with comparable pricing, context, or release timing.

Open xAI models
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...

Grok Build 0.1

Grok Build 0.1 is xAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...