Gemini 3.1 Pro vs Gemini 3.1 Pro Preview
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Gemini 3.1 Pro and Gemini 3.1 Pro Preview.
Gemini 3.1 Pro
Google's premiere multi-modal model featuring a massive 2 million token context window. Engineered for deep code analysis, video indexing, and long-context reasoning.
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...
Technical Specifications
| Specification | Gemini 3.1 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Provider | ||
| Context Window | 2,000,000 tokens | 1,048,576 tokens |
| Agent Suitability | 93/100 | N/A |
| Time to First Token (TTFT) | 420 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2026-04-20 | 2026-02-19 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Pro
$2.00
Gemini 3.1 Pro Preview
$2.00
Output Price per Million Tokens
Gemini 3.1 Pro
$12.00
Gemini 3.1 Pro Preview
$12.00
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Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Gemini 3.1 Pro Quirks & Gotchas
- ▸Best model for massive context — 2M token window is class-leading
- ▸Tool calling requires explicit schema definition in Google AI Studio
Gemini 3.1 Pro Preview Quirks & Gotchas
No developer gotchas reported.