Models / comparison
claude-opus-4-8 vs gemini-3.1-pro
List prices as of 2026-07-02 — the same table ReasonRank uses to compute verified savings in production.
| Model | Provider | Input / 1M | Output / 1M |
|---|---|---|---|
| claude-opus-4-8 | anthropic | $5 | $25 |
| gemini-3.1-pro | $2 | $12 |
At your volume
claude-opus-4-8
$1,350/mo
gemini-3.1-pro
$600.00/mo
cheaper by $750.00/mo at this volume
List-price math only. Whether the cheaper one holds quality on your workload is the question ReasonRank answers with a statistical gate + production verification.
Price answers “which is cheaper” — not “which is good enough for my workload.” ReasonRank runs both models on your own test cases, applies a statistical non-inferiority gate, and verifies realized savings on your live traffic. Run this comparison on your real workload.