Gemini 1.5 Pro vs Gemini 3.1 Pro
| Gemini 1.5 Pro | Gemini 3.1 Pro | |
|---|---|---|
| Provider | ||
| Context Window | 2,000,000 | 2,000,000 |
| Release Date | 2024-02-15 | — |
| Input Price | $1.25/ 1M tokens | $2.00/ 1M tokens |
| Output Price | $5.00/ 1M tokens | $12.00/ 1M tokens |
| Best for | multimodal · long-context analysis · chatbot · document processing | complex reasoning · coding · long-context · multimodal |
Capabilities
| Gemini 1.5 Pro | Gemini 3.1 Pro | |
|---|---|---|
| Vision | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Coding | ✓ | ✓ |
| Audio | ✓ | ✓ |
| Tools | ✓ | ✓ |
| Long Context | ✓ | ✓ |
Ranking Comparison
| Gemini 1.5 Pro | Gemini 3.1 Pro | |
|---|---|---|
| Overall | 50 | 50 |
| Benchmark | 0 | 0 |
| Capability | 100 | 100 |
| Price Efficiency | 100 | 100 |
| Context | 100 | 100 |
Overall = Benchmark 50% + Capability 20% + Price Efficiency 20% + Context 10%.
Benchmark Comparison
| Gemini 1.5 Pro | Gemini 3.1 Pro | |
|---|---|---|
| Coding | — | — |
| Reasoning | — | — |
| Math | — | — |
| Vision | — | — |
Price History
Gemini 1.5 Pro
| Date | Input | Output |
|---|---|---|
| 2026-08-05 | $1.25 | $5.00 |
/ 1M tokens
Gemini 3.1 Pro
| Date | Input | Output |
|---|---|---|
| 2026-08-05 | $2.00 | $12.00 |
/ 1M tokens
Gemini 1.5 Pro
Google's long-context multimodal model supporting up to 2M tokens.
Gemini 3.1 Pro
Google's newest flagship with a 2M context window and advanced reasoning (preview).
Frequently Asked Questions
Which model is better: Gemini 1.5 Pro or Gemini 3.1 Pro?
Based on overall scores, Gemini 1.5 Pro ranks higher (50 vs 50). See the comparison table for a full breakdown.
Which model is cheaper: Gemini 1.5 Pro or Gemini 3.1 Pro?
Gemini 1.5 Pro is cheaper: $1.25 vs $2 per 1M input tokens.
What are the capability differences between Gemini 1.5 Pro and Gemini 3.1 Pro?
Gemini 1.5 Pro and Gemini 3.1 Pro support the same set of capabilities.