Gemini 3.1 Pro vs Gemini 3 Pro
Gemini 3.1 Pro vs Gemini 3 Pro: Gemini 3.1 Pro is cheaper for input-heavy usage ($2.00/M vs $2.00/M input tokens), while Gemini 3 Pro is better for long-context tasks (2,000,000 tokens).
Direct answer: choose Gemini 3.1 Pro for lower token spend and choose Gemini 3 Pro when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Gemini 3.1 Pro
Gemini 3 Pro
Cost Differences
Gemini 3 Pro costs less than Gemini 3.1 Pro
Quick Recommendation
Winner for direct API pricing: Gemini 3.1 Pro. At the default workload, Gemini 3.1 Pro saves about $0.00/month ($0.00/year) versus Gemini 3 Pro.
Feature Comparison
| Feature | Gemini 3.1 Pro | Gemini 3 Pro |
|---|---|---|
| Provider | ||
| Input Price | $2.00/1M tokens | $2.00/1M tokens |
| Output Price | $12.00/1M tokens | $12.00/1M tokens |
| Context Window | 1,000,000 tokens | 2,000,000 tokens |
| Max Output | 65,536 tokens | 131,072 tokens |
| Category | flagship | flagship |
| Capabilities | textvisionaudiovideocodereasoning | textvisionaudiovideocode |
| Release Date | 2/19/2026 | 11/18/2025 |
Gemini 3.1 Pro vs Gemini 3 Pro: Which Should You Choose?
Choosing between Gemini 3.1 Pro and Gemini 3 Pro depends on your priorities: cost efficiency, context length, or raw capability. Gemini 3 Pro is the more affordable option at $2.00/1M input tokens. Meanwhile, Gemini 3 Pro offers a significantly larger context window at 2,000,000 tokens vs 1,000,000 for Gemini 3.1 Pro.
Both models are in the flagship category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Gemini 3 Pro would save you roughly $0.00/month compared to Gemini 3.1 Pro. For startups and indie developers, that difference can be significant.
Output costs matter too. Gemini 3.1 Pro charges $12.00/1M output tokens vs $12.00 for Gemini 3 Pro.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Gemini 3.1 Pro when:
- • You need more capabilities (reasoning)
- • You're already using Google's API ecosystem
Choose Gemini 3 Pro when:
- • You need a larger context window (2,000,000 tokens)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using Google's API ecosystem
Pros and Caveats at a Glance
Gemini 3.1 Pro
- • Input pricing: $2.00/M tokens
- • Output pricing: $12.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 65,536 tokens
Watch out for
- • Smaller context window than Gemini 3 Pro
Gemini 3 Pro
- • Input pricing: $2.00/M tokens
- • Output pricing: $12.00/M tokens
- • Context window: 2,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Trade-offs are minor in this matchup.
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Gemini 3.1 Pro (Google)
Gemini 3 Pro (Google)
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Sign Up for Google →Frequently Asked Questions
Which is cheaper, Gemini 3.1 Pro or Gemini 3 Pro?▼
What is the context window difference between Gemini 3.1 Pro and Gemini 3 Pro?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
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