#253

Gemini 3.1 Flash Lite Preview

Google Release: 2026-03-03 Tested on: 2026-10-01 02:17 google/gemini-3.1-flash-lite-preview::none

~150B total (~10B active)MoEClosedEstimated

(high) (medium) (low) (none)

Summary

Gemini 3.1 Flash Lite Preview scores 6.2 on AI BENCHY and ranks #253. It has 10.0 reliability, a 55.1% pass rate, $0.090 total cost, and 3.60s average response time.

What makes Gemini 3.1 Flash Lite Preview unique: It stands out most in Instructions following, where it ranks #1, while General Intelligence is its weakest area at #12. It is notably fast compared with similar models.

Identity note

Gemini 3.1 Flash Lite Preview was the preview version of Google: Gemini 3.1 Flash Lite.

Model facts

Researched on 2026-08-12

Estimated

Parameters: ~150B total (~10B active)
Architecture: MoE
Availability: Closed
License: -

Best estimate from public evidence; the vendor did not disclose every value. Google does not disclose parameter counts.

Parameter source Availability source

Score

6.2

Consistency

9.7

Reliability

10.0

Total Cost (Current Price)

$0.090

Total Output Tokens

15,760

Total Input Tokens

261,962

Input Price

$0.250 / 1M

Output Price

$1.500 / 1M

Cache Read Price

$0.025 / 1M

Cache Write Price

$0.084 / 1M

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Tests Correct

Wrong Tests: 11

Attempt pass rate: 55.1%

Flaky tests

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

3.60s

Response Time (max): 48.59s

Response Time (total): 82.91s

Wrong answer: 8 Did not follow instructions: 2 No answer: 1

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#253 Gemini 3.1 Flash Lite Preview

none

Cost: $0.003
Time: 4.7s
Tokens: 1,827 tok

Run history

Tested on	Score	Reliability	Total Cost	Compare
2026-10-01 02:17 Re-test	6.2	10.0	$0.090	Current run
2026-07-16 22:52 New test added	6.4	10.0	$0.052	Compare
2026-06-04 14:00 New test added	7.2	10.0	$0.018	Compare
2026-05-22 00:27 Suite changed	7.5	10.0	$0.017	Compare
2026-04-11 01:44 First recorded run	7.9	N/A	$0.016	Compare

This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.

Run comparison

Run	Benchmark coverage	Score	Consistency	Reliability	Tests Correct	Flaky tests	Total Output Tokens	Total Input Tokens	Total Cost	Response Time (avg)
2026-10-01 02:17 · Current run	69/69 attempts	6.2	9.7	10.0	12/23	1	15,760	261,962	$0.090	3.60s
2026-07-16 22:52 · New test added	66/66 attempts	6.4	9.7	10.0	12/22	1	14,292	120,942	$0.052	1.58s
Difference	—	-0.3	0.0	0.0	0	0	+1468	+141020	+$0.038	+2027ms

Benchmark coverage differs: 69/69 attempts (Target: 3 repeats per test) versus 66/66 attempts (Target: 3 repeats per test). Totals and repeat-sensitive metrics are not directly comparable.

These two runs used different benchmark suites, so the deltas reflect both model changes and suite changes.

Price History

Historical pricing data for this model from OpenRouter.

Date	Input Price	Output Price	Cache Read Price	Cache Write Price
2026-08-14 12:51	$0.250 / 1M	$1.500 / 1M	N/A	N/A
2026-10-01 18:33	$0.250 / 1M	$1.500 / 1M	$0.025 / 1M	$0.084 / 1M

Charts

Choose the first model, then click a second model to open a side-by-side page.

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

Category Breakdown

Category	Score	Consistency
Agentic	5.0	10.0
Anti-AI Tricks	7.5	8.4
Coding	5.5	10.0
Combined	3.0	10.0
Data parsing and extraction	10.0	10.0
Domain specific	5.3	10.0
General Intelligence	4.0	10.0
Instructions following	10.0	10.0
Puzzle Solving	10.0	10.0
Tool Calling	10.0	10.0
Trivia	3.0	10.0

Gemini 3.1 Flash Lite Preview

Model facts

Hamster playing table tennis

#253 Gemini 3.1 Flash Lite Preview

Charts

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

Category Breakdown

Compared models