Model comparison · updated 2026-10-02
Side-by-side pricing for1 million tokens
| Claude Opus 5 | Gemini 3.1 Pro | Verdict | |
|---|---|---|---|
| Provider | Anthropic | -- | |
| Context window | 1M | 1M | -- |
| Input / 1M tokens | $5 | $2 | Gemini 3.1 Pro is 2.5x cheaper |
| Output / 1M tokens | $25 | $12 | Gemini 3.1 Pro is 2.1x cheaper |
| Output:input ratio | 5x | 6x | -- |
| Tier | flagship | flagship | -- |
Gemini 3.1 Pro: Prices rise to $4 / $18 for prompts above 200K tokens.
Claude Opus 5
2,000,000 tokens
Gemini 3.1 Pro
5,000,000 tokens
Gemini 3.1 Pro gives you 2.5x more input for the same budget.
Claude Opus 5
400,000 tokens
Gemini 3.1 Pro
833,333 tokens
Gemini 3.1 Pro gives you 2.1x more output for the same budget.