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Google: Gemini 3.8 Flash vs Perplexity: Sonar Reasoning Pro
Google: Gemini 3.8 Flash is cheaper on the sample workload, at $4.5 before converting to INR.A different input and output mix can change the result.
| Model | Context | Input $/1M | Output $/1M | Sample USD | Sample INRUSDEURGBPSGDAUDCADJPYCHFHKDCNY | Sample INR + GST |
|---|---|---|---|---|---|---|
| Google: Gemini 3.8 Flash | 1.05M | $0.75 | $3.75 | $4.5 | ₹430.83$4.5€4.02£3.4SGD 5.76A$6.46CA$6.41¥713CHF 3.74HK$35.34CN¥30.09 | ₹508.38 |
| Perplexity: Sonar Reasoning Pro | 128K | $2 | $8 | $10.8 | ₹1,033.99$10.8€9.64£8.16SGD 13.82A$15.5CA$15.39¥1,711CHF 8.98HK$84.82CN¥72.23 | ₹1,220.11 |
Sample workload: 100,000 input tokens and 20,000 output tokens per day for 30 days.
Questions
Which is cheaper, Google: Gemini 3.8 Flash or Perplexity: Sonar Reasoning Pro?
Google: Gemini 3.8 Flash is cheaper on this workload. Google: Gemini 3.8 Flash is $4.5 (₹430.83 without GST, ₹508.38 with GST). Perplexity: Sonar Reasoning Pro is $10.8 (₹1,033.99 without GST, ₹1,220.11 with GST). The sample workload is 100,000 input tokens and 20,000 output tokens per day for 30 days. A different input/output mix can change the winner when one model is cheaper on input and the other on output.
Do these comparison prices include Indian GST?
The table shows USD from OpenRouter, INR without GST, and INR with 18% GST. GST is applied to the converted INR amount. It is not included in the USD rate.
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