Gemini 2.5 Pro Preview 06-05 vs Gemini 3.1 Flash-Lite
Gemini 2.5 Pro Preview 06-05 and Gemini 3.1 Flash-Lite are closely matched at 30.0 and 31.2 on the LLM Stats Score. Gemini 3.1 Flash-Lite is 6.1x cheaper per token.
Google · Google · Updated for 2026
Which is better?
Gemini 2.5 Pro Preview 06-05 and Gemini 3.1 Flash-Lite are closely matched on the overall LLM Stats Score at 30.0 and 31.2.
The models split the 6 individual benchmarks reported for both models evenly.
On price, Gemini 3.1 Flash-Lite is roughly 6.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 2.5 Pro Preview 06-05 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 2.5 Pro Preview 06-05
- you process long inputs — it offers a 1,048,576 token context window
Choose Gemini 3.1 Flash-Lite
- cost matters — it's about 6.1x cheaper per token
- you want the most recent training data — it shipped Mar 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 · 11 for Gemini 3.1 Flash-Lite
Gemini 2.5 Pro Preview 06-05 outperforms in 3 benchmarks (FACTS Grounding, Humanity's Last Exam, SimpleQA), while Gemini 3.1 Flash-Lite is better at 3 benchmarks (GPQA, MRCR v2 (8-needle), VideoMMMU).
Both models are evenly matched across the 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 5.0x more expensive than Gemini 3.1 Flash-Lite ($0.25/1M tokens).
For output processing, Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens) is 6.7x more expensive than Gemini 3.1 Flash-Lite ($1.50/1M tokens).
In conclusion, Gemini 2.5 Pro Preview 06-05 is more expensive than Gemini 3.1 Flash-Lite.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 2.5 Pro Preview 06-05 accepts 1,048,576 input tokens compared to Gemini 3.1 Flash-Lite's 1,000,000 tokens. Gemini 3.1 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 3.1 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 3.1 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 3.1 Flash-Lite was released on 2026-03-03.
Gemini 3.1 Flash-Lite is 9 months newer than Gemini 2.5 Pro Preview 06-05.
Jun 5, 2025
1.2 years ago
Mar 3, 2026
6 months ago
9mo newerKnowledge Cutoff
When training data ends
Both models have the same knowledge cutoff date of 2025-01-31.
They should have similar awareness of historical events and information up to this date.
Jan 2025
Jan 2025
Provider Availability
Gemini 2.5 Pro Preview 06-05 is available from Google. Gemini 3.1 Flash-Lite is available from Google.
Gemini 2.5 Pro Preview 06-05
Gemini 3.1 Flash-Lite
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 2.5 Pro Preview 06-05 and Gemini 3.1 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 3.1 Flash-Lite.