Claude Opus 5.5 vs Gemini 3.1 Pro Preview API pricing
Gemini 3.1 Pro Preview is cheaper on every example workload below. Prices last checked 2026-10-14.
| Claude Opus 5.5 (Anthropic) | Gemini 3.1 Pro Preview (Google) | |
|---|---|---|
| Input $/1M tokens | $4.0 | $2.0 |
| Output $/1M tokens | $20.0 | $12.0 |
| Context | — | — |
| Our tier (1–4) | 4 | 3 |
Example monthly bills
| Workload | Claude Opus 5.5 | Gemini 3.1 Pro Preview | Cheaper |
|---|---|---|---|
| Chat / Q&A 10M in / 2M out per month | $80.00 | $44.00 | Gemini 3.1 Pro Preview saves $36.00/mo (45%) |
| Coding 20M in / 5M out per month | $180.00 | $100.00 | Gemini 3.1 Pro Preview saves $80.00/mo (44%) |
| Output-heavy (reasoning, long answers) 10M in / 10M out per month | $240.00 | $140.00 | Gemini 3.1 Pro Preview saves $100.00/mo (42%) |
Fine print
- Gemini 3.1 Pro Preview: ≤200K prompt; >200K $4/$18; preview
Cost only, not quality. “Tier” is our rough capability judgment, not a benchmark, and different tokenizers count the same text differently. Reasoning models may bill extra thinking tokens as output. Official sources: Anthropic, Google.
See all models on the full price table, the Anthropic and Google pricing pages, or try the savings calculator with your own numbers.