Gemini 2.5 Pro Preview 06-05 vs Gemini 3.5 Flash-Lite
Gemini 2.5 Pro Preview 06-05 and Gemini 3.5 Flash-Lite are closely matched at 29.9 and 30.1 on the LLM Stats Score. Gemini 3.5 Flash-Lite is 4.0x cheaper per token.
Google · Google · Updated for 2026
Which is better?
Gemini 2.5 Pro Preview 06-05 and Gemini 3.5 Flash-Lite are closely matched on the overall LLM Stats Score at 29.9 and 30.1.
In the 1 individual benchmarks reported for both models, Gemini 3.5 Flash-Lite wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Gemini 3.5 Flash-Lite is roughly 4.0x 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 Pro Preview 06-05
- you want predictable pricing at $1.25/M input and $10.00/M output
Choose Gemini 3.5 Flash-Lite
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- cost matters — it's about 4.0x cheaper per token
- you want the most recent training data — it shipped Jul 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
13 reported for Gemini 2.5 Pro Preview 06-05 · 6 for Gemini 3.5 Flash-Lite
Gemini 2.5 Pro Preview 06-05 outperforms in 0 benchmarks, while Gemini 3.5 Flash-Lite is better at 1 benchmark (MRCR v2 (8-needle)).
Gemini 3.5 Flash-Lite significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens) is 4.2x more expensive than Gemini 3.5 Flash-Lite ($0.30/1M tokens).
For output processing, Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens) is 4.0x more expensive than Gemini 3.5 Flash-Lite ($2.50/1M tokens).
In conclusion, Gemini 2.5 Pro Preview 06-05 is more expensive than Gemini 3.5 Flash-Lite.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. Gemini 3.5 Flash-Lite can generate longer responses up to 65,536 tokens, while Gemini 2.5 Pro Preview 06-05 is limited to 65,535 tokens.
Input capabilities
Documented input modalities across available providers
Both Gemini 2.5 Pro Preview 06-05 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 Pro Preview 06-05
Gemini 3.5 Flash-Lite
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05, while Gemini 3.5 Flash-Lite was released on 2026-07-21.
Gemini 3.5 Flash-Lite is 14 months newer than Gemini 2.5 Pro Preview 06-05.
Jun 5, 2025
1.3 years ago
Jul 21, 2026
1 months ago
1.1yr newerKnowledge Cutoff
When training data ends
Gemini 2.5 Pro Preview 06-05 has a knowledge cutoff of 2025-01-31, 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 Pro Preview 06-05 (2025-01-31).
Jan 2025
Mar 2026
1.2 yr newerProvider Availability
Gemini 2.5 Pro Preview 06-05 is available from Google. Gemini 3.5 Flash-Lite is available from Google.
Gemini 2.5 Pro Preview 06-05
Gemini 3.5 Flash-Lite
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 2.5 Pro Preview 06-05 and Gemini 3.5 Flash-Lite side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 2.5 Pro Preview 06-05 vs Gemini 3.5 Flash-Lite.