Gemini 3.1 Pro vs Claude Opus 4.8
A direct API-pricing comparison between Gemini 3.1 Pro and Claude Opus 4.8. Below: every cost dimension side by side, then the bottom line for a typical workload.
Bottom line
For a typical 5K-in / 1K-out request, Gemini 3.1 Pro is the cheaper choice at $0.022 per call — 2.3× less than Claude Opus 4.8 at $0.050.
| Gemini 3.1 ProGoogle | Claude Opus 4.8Anthropic | |
|---|---|---|
| Input / 1M tokens | $2.00 | $5.00 |
| Output / 1M tokens | $12.00 | $25.00 |
| Cached input / 1M | — | $0.500 |
| Context window | 1M | 200K |
| Provider | Anthropic |
Green = cheaper on that line. Prices are estimates from public pricing pages; verify against Google and Anthropic before relying on them.
Which is cheaper, Gemini 3.1 Pro or Claude Opus 4.8?
On output tokens — usually the dominant cost — Gemini 3.1 Pro charges $12.00 per million versus $25.00 for Claude Opus 4.8. The right pick depends on your input/output ratio and how much you can serve from cache. Use the calculator to model your exact traffic.