tokevenGPT 3.5 Turbo vs Gemini 3.1 Pro Custom Tools
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 3.5 Turbo
Fast / BudgetGemini 3.1 Pro Custom Tools
Mid-tierQuality
Task confidence comparison
Guidance
When to use GPT 3.5 Turbo vs Gemini 3.1 Pro Custom Tools
Choose GPT 3.5 Turbo when...
- -Cost matters: 75% cheaper on input tokens
Choose Gemini 3.1 Pro Custom Tools when...
- -You need a larger context window (1,048.576K vs 16.385K)
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
FAQ
When should I use GPT 3.5 Turbo instead of Gemini 3.1 Pro Custom Tools?
GPT 3.5 Turbo and Gemini 3.1 Pro Custom Tools perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 3.1 Pro Custom Tools cheaper than GPT 3.5 Turbo?
Gemini 3.1 Pro Custom Tools input costs $2.00/MTok, which is 300% more than GPT 3.5 Turbo at $0.50/MTok.
What are the context window sizes for GPT 3.5 Turbo and Gemini 3.1 Pro Custom Tools?
GPT 3.5 Turbo has a 16.385K token context window. Gemini 3.1 Pro Custom Tools has a 1,048.576K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
GPT 3.5 Turbo pricing & benchmarks
$0.50 / $1.50 per MTok
GPT 3.5 Turbo cost calculator
All GPT models
GPT 3.5 Turbo pricing history
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
Other comparisons
How GPT 3.5 Turbo and Gemini 3.1 Pro Custom Tools 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.