Model Comparison

Gemini 2.5 Flash-Lite vs Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite shows notably better performance in the majority of benchmarks. Gemini 2.5 Flash-Lite is 3.2x cheaper per token.

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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.

Sat May 09 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
Sat May 09 2026 • llm-stats.com
Google
Gemini 2.5 Flash-Lite
Input tokens$0.10
Output tokens$0.40
Best providerGoogle
Google
Gemini 3.1 Flash-Lite
Input tokens$0.25
Output tokens$1.50
Best providerGoogle
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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.

Google
Gemini 2.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Google
Gemini 3.1 Flash-Lite
Input1,000,000 tokens
Output65,536 tokens
Sat May 09 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

10 months ago

Gemini 3.1 Flash-Lite

Mar 3, 2026

2 months 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.

Gemini 2.5 Flash-Lite

google logo
Google
Input Price:Input: $0.10/1MOutput Price:Output: $0.40/1M

Gemini 3.1 Flash-Lite

google logo
Google
Input Price:Input: $0.25/1MOutput Price:Output: $1.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher FACTS Grounding score (84.1% vs 40.6%)
Google
Higher GPQA score (86.9% vs 64.6%)
Higher Humanity's Last Exam score (16.0% vs 5.1%)
Higher SimpleQA score (43.3% vs 10.7%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 2.5 Flash-Lite
Google
Gemini 3.1 Flash-Lite

FAQ

Common questions about Gemini 2.5 Flash-Lite vs Gemini 3.1 Flash-Lite.

Which is better, Gemini 2.5 Flash-Lite or Gemini 3.1 Flash-Lite?

Gemini 3.1 Flash-Lite shows notably better performance in the majority of benchmarks. Gemini 2.5 Flash-Lite is made by Google and Gemini 3.1 Flash-Lite is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 2.5 Flash-Lite compare to Gemini 3.1 Flash-Lite in benchmarks?

Gemini 2.5 Flash-Lite scores FACTS Grounding: 84.1%, Global-MMLU-Lite: 81.1%, MMMU: 72.9%, GPQA: 64.6%, Vibe-Eval: 51.3%. Gemini 3.1 Flash-Lite scores MMMLU: 88.9%, GPQA: 86.9%, VideoMMMU: 84.8%, MMMU-Pro: 76.8%, CharXiv-R: 73.2%.

Is Gemini 2.5 Flash-Lite cheaper than Gemini 3.1 Flash-Lite?

Gemini 2.5 Flash-Lite is 2.5x cheaper for input tokens. Gemini 2.5 Flash-Lite costs $0.10/M input and $0.40/M output via google. Gemini 3.1 Flash-Lite costs $0.25/M input and $1.50/M output via google.

What are the context window sizes for Gemini 2.5 Flash-Lite and Gemini 3.1 Flash-Lite?

Gemini 2.5 Flash-Lite supports 1.0M tokens and Gemini 3.1 Flash-Lite supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 2.5 Flash-Lite and Gemini 3.1 Flash-Lite?

Key differences include context window (1.0M vs 1.0M), input pricing ($0.10 vs $0.25/M), licensing (Creative Commons Attribution 4.0 License vs Proprietary). See the full comparison above for benchmark-by-benchmark results.