tokevenGemini 3.1 Pro Custom Tools vs Grok 4.20 Reasoning
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-tierGrok 4.20 Reasoning
Mid-tierQuality
Task confidence comparison
Guidance
When to use Gemini 3.1 Pro Custom Tools vs Grok 4.20 Reasoning
Choose Gemini 3.1 Pro Custom Tools when...
- -You need a larger context window (1,048.576K vs 1,000K)
- Similar performance; consider provider preference or ecosystem fit.
Choose Grok 4.20 Reasoning when...
- -Cost matters: 38% cheaper on input tokens
At scale
Cost at scale
FAQ
When should I use Gemini 3.1 Pro Custom Tools instead of Grok 4.20 Reasoning?
Gemini 3.1 Pro Custom Tools and Grok 4.20 Reasoning perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.20 Reasoning cheaper than Gemini 3.1 Pro Custom Tools?
Yes. Grok 4.20 Reasoning input costs $1.25/MTok vs $2.00/MTok for Gemini 3.1 Pro Custom Tools, saving 38% on input.
What are the context window sizes for Gemini 3.1 Pro Custom Tools and Grok 4.20 Reasoning?
Gemini 3.1 Pro Custom Tools has a 1,048.576K token context window. Grok 4.20 Reasoning has a 1,000K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Gemini 3.1 Pro Custom Tools pricing & benchmarks
$2.00 / $12.00 per MTok
Gemini 3.1 Pro Custom Tools cost calculator
All Gemini models
Gemini 3.1 Pro Custom Tools pricing history
Grok 4.20 Reasoning pricing & benchmarks
$1.25 / $2.50 per MTok
Grok 4.20 Reasoning cost calculator
All Grok models
Grok 4.20 Reasoning pricing history
Other comparisons
How Gemini 3.1 Pro Custom Tools and Grok 4.20 Reasoning stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.