Gemini 1.5 Pro vs Gemini 3 Flash
Google vs Google — benchmarks, pricing, and capabilities side by side.
- •Gemini 3 Flash has the higher intelligence index (90.2 vs 67.3)
- •Gemini 3 Flash is cheaper ($0.50 vs $1.25 per 1M input)
- •Gemini 3 Flash is faster
- •Gemini 1.5 Pro has a larger context window (2M)
| Gemini 1.5 Pro | Gemini 3 Flash | |
|---|---|---|
| Intelligence index | 67.3 | 90.2 |
| Developer | ||
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 2,000,000 tokens | 1,048,576 tokens |
| Input price | $1.25 / 1M | $0.50 / 1M |
| Output price | $5.00 / 1M | $3.00 / 1M |
| Speed | 85 tok/s | 191 tok/s |
| Released | February 15, 2024 | December 17, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | Text, Image, Audio, Video |
| Output modalities | Text | Text |
Shared benchmarks
Gemini 1.5 Pro
Gemini 3 Flash
GPQA Diamond
59.1
90.4
Humanity’s Last Exam
4.9
34.7
LiveCodeBench
31.6
90.8
MMLU-Pro
75.8
89