Gemini 2.5 Flash vs Gemini 3.1 Flash-Lite
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 2.5 Flash
Google · Jun 2025
The 2025 fast-tier favorite: hybrid reasoning, full multimodality and a 1M context at $0.30/$2.50.
Gemini 3.1 Flash-Lite
Google · Mar 2026
The cheapest Gemini 3 model: multimodal input and a 1M context for $0.25/$1.50 — built for massive-scale pipelines.
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. Gemini 3.1 Flash-Lite is about 1.5x cheaper per blended million tokens (3:1 input:output mix). Gemini 2.5 Flash also takes 1.0M of context versus 1M for Gemini 3.1 Flash-Lite.
Specs & pricing
| Gemini 2.5 Flash | Gemini 3.1 Flash-Lite | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $0.3 | $0.25 |
| Output price / 1M | $2.5 | $1.5 |
| Context window | 1.0M | 1M |
| Max output | 66K | 66K |
| Open weights | no | no |
| Reasoning model | yes | no |
| Multimodal input | text, image, audio, video | text, image, audio, video |
| Knowledge cutoff | Jan 2025 | Nov 2025 |
| Released | Jun 2025 | Mar 2026 |
| Example monthly cost* | $6.75 | $4.75 |
* 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 or Gemini 3.1 Flash-Lite?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. Gemini 3.1 Flash-Lite is about 1.5x cheaper per blended million tokens (3:1 input:output mix). Gemini 2.5 Flash also takes 1.0M of context versus 1M for Gemini 3.1 Flash-Lite.
- Which is cheaper, Gemini 2.5 Flash or Gemini 3.1 Flash-Lite?
- Gemini 2.5 Flash costs $0.3/$2.5 per million input/output tokens, while Gemini 3.1 Flash-Lite costs $0.25/$1.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $6.75 versus $4.75.
- Which model is better for coding, Gemini 2.5 Flash or Gemini 3.1 Flash-Lite?
- 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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