Simulating realistic Agentic workflow parameters (40,000 in / 1,500 out with 65% cache reuse). Gemini 3.1 Pro delivers a 64% cost reduction over Perplexity Sonar Pro.
| Traffic Volume Tier | Gemini 3.1 Pro Monthly | Perplexity Sonar Pro Monthly | Monthly Savings by picking Gemini 3.1 Pro |
|---|---|---|---|
| 1,000 reqs/mo (Dev/Testing) | $51.20 | $142.50 | Save $91.30 / mo |
| 10,000 reqs/mo (Small App) | $512.00 | $1,425.00 | Save $913.00 / mo |
| 100,000 reqs/mo (Growth Production) | $5,120.00 | $14,250.00 | Save $9,130.00 / mo |
| 1,000,000 reqs/mo (Scale SaaS) | $51,200.00 | $142,500.00 | Save $91,300.00 / mo |
Gemini 3.1 Pro is 64% cheaper for Agentic workflow workloads. At standard Agentic workflow parameter ratios (40,000 input tokens, 1,500 output tokens, 65% cache hit), Gemini 3.1 Pro costs $0.0512 per request compared to $0.1425 on Perplexity Sonar Pro.
Gemini 3.1 Pro offers a context window of 2,000,000 tokens (max output: 128,000), while Perplexity Sonar Pro offers 200,000 tokens (max output: 8,192).
At 100,000 requests per month, using Gemini 3.1 Pro saves $9,130.00 every month (or $109,560.00 annually) compared to Perplexity Sonar Pro.
Prompt caching is the single biggest lever — each step re-reads prior context. Summarize or prune tool outputs before appending them to the transcript. Cap the step budget; runaway loops are the #1 surprise on agent invoices.