Gemini 2.5 Flash-Lite vs Gemini 3.1 Pro
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 2.5 Flash-Lite
Google · Jul 2025
Ten cents per million input tokens with multimodal support — the price floor of the 2025 Gemini lineup.
Gemini 3.1 Pro
Google · Mar 2026
Google's flagship with the industry's largest context window — 2M tokens — and frontier multimodal reasoning at $2/$12.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Gemini 2.5 Flash-Lite works out roughly 26x cheaper per blended million tokens. Gemini 3.1 Pro also takes 2M of context versus 1.0M for Gemini 2.5 Flash-Lite.
Specs & pricing
| Gemini 2.5 Flash-Lite | Gemini 3.1 Pro | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $0.1 | $2 |
| Output price / 1M | $0.4 | $12 |
| Context window | 1.0M | 2M |
| Max output | 66K | 66K |
| Open weights | no | no |
| Reasoning model | no | yes |
| Multimodal input | text, image, audio, video | text, image, audio, video |
| Knowledge cutoff | Jan 2025 | Nov 2025 |
| Released | Jul 2025 | Mar 2026 |
| Example monthly cost* | $1.60 | $38.00 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 2.5 Flash-Lite or Gemini 3.1 Pro?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Gemini 2.5 Flash-Lite works out roughly 26x cheaper per blended million tokens. Gemini 3.1 Pro also takes 2M of context versus 1.0M for Gemini 2.5 Flash-Lite.
- Which is cheaper, Gemini 2.5 Flash-Lite or Gemini 3.1 Pro?
- Gemini 2.5 Flash-Lite costs $0.1/$0.4 per million input/output tokens, while Gemini 3.1 Pro costs $2/$12. For a typical workload of 10M input and 1.5M output tokens per month, that's $1.60 versus $38.00.
- Which model is better for coding, Gemini 2.5 Flash-Lite or Gemini 3.1 Pro?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.
More comparisons
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