GeminivsGrok

Gemini 3.1 Pro Custom Tools vs Grok Build 0.1

Side-by-side comparison of pricing, task quality, and projected cost at higher scale.

Pricing

Side-by-side pricing

Gemini 3.1 Pro Custom Tools

Mid-tier

Grok Build 0.1

Fast / Budget
Input $/MTok
$2.00
$1.00
Output $/MTok
$12.00
$2.00
Cache discount
90% off
80% off
Context
1,048.576K
256K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
0
Code Review
0
vs
0
Summarization
0
vs
0
Q&A
0
vs
0
Extraction
0
vs
0
Reasoning
0
vs
0
Classification
0
vs
0
Creative Writing
0
vs
0
Gemini 3.1 Pro Custom Tools
Grok Build 0.1

Guidance

When to use Gemini 3.1 Pro Custom Tools vs Grok Build 0.1

Choose Gemini 3.1 Pro Custom Tools when...

  • -You need a larger context window (1,048.576K vs 256K)
  • Similar performance; consider provider preference or ecosystem fit.

Choose Grok Build 0.1 when...

  • -Cost matters: 50% cheaper on input tokens

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
Gemini 3.1 Pro Custom Tools
Grok Build 0.1
100K tokens
$0.50
$0.13Cheaper
1M tokens
$8.20
$2.60Cheaper
10M tokens
$82.00
$26.00Cheaper

FAQ

When should I use Gemini 3.1 Pro Custom Tools instead of Grok Build 0.1?

Gemini 3.1 Pro Custom Tools and Grok Build 0.1 perform similarly across all tracked tasks. Pick based on pricing and provider preference.

Is Grok Build 0.1 cheaper than Gemini 3.1 Pro Custom Tools?

Yes. Grok Build 0.1 input costs $1.00/MTok vs $2.00/MTok for Gemini 3.1 Pro Custom Tools, saving 50% on input.

What are the context window sizes for Gemini 3.1 Pro Custom Tools and Grok Build 0.1?

Gemini 3.1 Pro Custom Tools has a 1,048.576K token context window. Grok Build 0.1 has a 256K token context window.

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.