tokevenClaude Opus 5 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
Claude Opus 5
FlagshipGemini 3.1 Pro Custom Tools
Mid-tierQuality
Task confidence comparison
Guidance
When to use Claude Opus 5 vs Gemini 3.1 Pro Custom Tools
Choose Claude Opus 5 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini 3.1 Pro Custom Tools when...
- -Cost matters: 60% cheaper on input tokens
- -You need a larger context window (1,048.576K vs 1,000K)
At scale
Cost at scale
FAQ
When should I use Claude Opus 5 instead of Gemini 3.1 Pro Custom Tools?
Claude Opus 5 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 Claude Opus 5?
Yes. Gemini 3.1 Pro Custom Tools input costs $2.00/MTok vs $5.00/MTok for Claude Opus 5, saving 60% on input.
What are the context window sizes for Claude Opus 5 and Gemini 3.1 Pro Custom Tools?
Claude Opus 5 has a 1,000K 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.
Claude Opus 5 pricing & benchmarks
$5.00 / $25.00 per MTok
Claude Opus 5 cost calculator
All Claude models
Claude Opus 5 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 Claude Opus 5 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.