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Gemini 2.5 Flash-Lite vs Gemini 3.5 Flash-Lite

Gemini 3.5 Flash-Lite leads the LLM Stats Score 29.9 to 10.4. Gemini 2.5 Flash-Lite is 4.9x cheaper per token.

Google · Google · Updated for 2026

Which is better?

Gemini 3.5 Flash-Lite leads the overall LLM Stats Score 29.9 to 10.4, ranking #123 overall.

On price, Gemini 2.5 Flash-Lite is roughly 4.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 2.5 Flash-Lite

  • cost matters — it's about 4.9x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose Gemini 3.5 Flash-Lite

  • overall performance matters — it scores 29.9 and ranks #123 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Jul 2026

At a glance

The differences that matter most.

Gemini 2.5 Flash-Lite
Google
Gemini 3.5 Flash-Lite
Google
Core performance indexes
LLM Stats Score
10.4
#263
29.9
#123
Reasoning
10.9
#257
25.9
#148
Coding
-2.8
#250
16.0
#127
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.10 / M
$0.30 / M
Output price
$0.40 / M
$2.50 / M
Context window
1,048,576
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Gemini 2.5 Flash-Lite
Gemini 3.5 Flash-Lite
Vision
3.5#162
19.5#73
Multimodal
11.6#110
21.9#61
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

13 reported for Gemini 2.5 Flash-Lite · 6 for Gemini 3.5 Flash-Lite

No common benchmarks found

Gemini 2.5 Flash-Lite and Gemini 3.5 Flash-Litedon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

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 3.0x cheaper than Gemini 3.5 Flash-Lite ($0.30/1M tokens).

For output processing, Gemini 2.5 Flash-Lite ($0.40/1M tokens) is 6.3x cheaper than Gemini 3.5 Flash-Lite ($2.50/1M tokens).

In conclusion, Gemini 3.5 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
Sun Sep 13 2026 • llm-stats.com
Google
Gemini 2.5 Flash-Lite
Input tokens$0.10
Output tokens$0.40
Best providerGoogle
Google
Gemini 3.5 Flash-Lite
Input tokens$0.30
Output tokens$2.50
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 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 3.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Sun Sep 13 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 2.5 Flash-Lite and Gemini 3.5 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 3.5 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 3.5 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 3.5 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 3.5 Flash-Lite was released on 2026-07-21.

Gemini 3.5 Flash-Lite is 13 months newer than Gemini 2.5 Flash-Lite.

Gemini 2.5 Flash-Lite

Jun 17, 2025

1.2 years ago

Gemini 3.5 Flash-Lite

Jul 21, 2026

1 months ago

1.1yr newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Flash-Lite has a knowledge cutoff of 2025-01-01, while Gemini 3.5 Flash-Lite has a cutoff of 2026-03-31.

Gemini 3.5 Flash-Lite has more recent training data (up to 2026-03-31), 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 3.5 Flash-Lite

Mar 2026

1.2 yr newer

Provider Availability

Gemini 2.5 Flash-Lite is available from Google. Gemini 3.5 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 3.5 Flash-Lite

google logo
Google
Input Price:Input: $0.30/1MOutput Price:Output: $2.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 2.5 Flash-Lite and Gemini 3.5 Flash-Lite side-by-side, then vote on the output you prefer.

Gemini 2.5 Flash-Lite
✓ Preferred
Gemini 3.5 Flash-Lite
Open in Playground

FAQ

Common questions about Gemini 2.5 Flash-Lite vs Gemini 3.5 Flash-Lite.

Which is better, Gemini 2.5 Flash-Lite or Gemini 3.5 Flash-Lite?

Gemini 3.5 Flash-Lite leads the LLM Stats Score 29.9 to 10.4. Gemini 2.5 Flash-Lite is made by Google and Gemini 3.5 Flash-Lite is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 2.5 Flash-Lite compare to Gemini 3.5 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 3.5 Flash-Lite scores CharXiv-R: 76.5%, OSWorld-Verified: 74.0%, SWE-Bench Pro: 54.2%, Terminal-Bench 2.1: 54.0%, MLE-Bench: 39.2%.

Is Gemini 2.5 Flash-Lite cheaper than Gemini 3.5 Flash-Lite?

Gemini 2.5 Flash-Lite is 3.0x cheaper for input tokens. Gemini 2.5 Flash-Lite costs $0.10/M input and $0.40/M output via google. Gemini 3.5 Flash-Lite costs $0.30/M input and $2.50/M output via google.

What are the context window sizes for Gemini 2.5 Flash-Lite and Gemini 3.5 Flash-Lite?

Gemini 2.5 Flash-Lite supports 1.0M tokens and Gemini 3.5 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 3.5 Flash-Lite?

Key differences include LLM Stats Score (10.4 vs 29.9), input pricing ($0.10 vs $0.30/M), licensing (Creative Commons Attribution 4.0 License vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

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