Gemini 2.5 Flash-Lite vs Gemini 3.1 Flash-Lite Comparison

Comparing Gemini 2.5 Flash-Lite and Gemini 3.1 Flash-Lite across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Gemini 2.5 Flash-Lite outperforms in 1 benchmarks (FACTS Grounding), while Gemini 3.1 Flash-Lite is better at 3 benchmarks (GPQA, Humanity's Last Exam, SimpleQA).

Gemini 3.1 Flash-Lite shows notably better performance in the majority of benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Flash-Lite costs less

For input processing, Gemini 2.5 Flash-Lite ($0.10/1M tokens) is 2.5x cheaper than Gemini 3.1 Flash-Lite ($0.25/1M tokens).

For output processing, Gemini 2.5 Flash-Lite ($0.40/1M tokens) is 3.8x cheaper than Gemini 3.1 Flash-Lite ($1.50/1M tokens).

In conclusion, Gemini 3.1 Flash-Lite is more expensive than Gemini 2.5 Flash-Lite.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

Gemini 2.5 Flash-Lite

Input tokens$0.10

Output tokens$0.40

Best providerGoogle

Gemini 3.1 Flash-Lite

Input tokens$0.25

Output tokens$1.50

Best providerGoogle

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to Gemini 3.1 Flash-Lite's 1,000,000 tokens. Both models can generate responses up to 65,536 tokens.

Gemini 2.5 Flash-Lite

Input1,048,576 tokens

Output65,536 tokens

Gemini 3.1 Flash-Lite

Input1,000,000 tokens

Output65,536 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 2.5 Flash-Lite and Gemini 3.1 Flash-Lite support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 2.5 Flash-Lite

Text

Images

Audio

Video

Gemini 3.1 Flash-Lite

Text

Images

Audio

Video

License

Usage and distribution terms

Gemini 2.5 Flash-Lite is licensed under Creative Commons Attribution 4.0 License, while Gemini 3.1 Flash-Lite uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Gemini 2.5 Flash-Lite

Creative Commons Attribution 4.0 License

Open weights

Gemini 3.1 Flash-Lite

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 2.5 Flash-Lite was released on 2025-06-17, while Gemini 3.1 Flash-Lite was released on 2026-03-03.

Gemini 3.1 Flash-Lite is 9 months newer than Gemini 2.5 Flash-Lite.

Gemini 2.5 Flash-Lite

Jun 17, 2025

9 months ago

Gemini 3.1 Flash-Lite

Mar 3, 2026

2 weeks ago

8mo newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Flash-Lite has a knowledge cutoff of 2025-01-01, while Gemini 3.1 Flash-Lite has a cutoff of 2025-01-31.

Gemini 3.1 Flash-Lite has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Gemini 2.5 Flash-Lite (2025-01-01).

Gemini 2.5 Flash-Lite

Jan 2025

Gemini 3.1 Flash-Lite

Jan 2025

Provider Availability

Gemini 2.5 Flash-Lite is available from Google. Gemini 3.1 Flash-Lite is available from Google. The availability of providers can affect quality of the model and reliability.