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Gemini 3.1 Flash Lite (medium) vs Mercury 2.5 Preview (medium)

Gemini 3.1 Flash Lite (medium) leads on average score with 6.9 vs 6.8. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.039 vs $0.153. Gemini 3.1 Flash Lite (medium) is faster at 6.27s vs 6.66s, with pass rates of 59.4% vs 66.7%.

Last updated at: 2026-10-26

Compared models

Rank
#204
Total Output Tokens
63,967
Response Time (avg)
6.27s
Total Cost
$0.153
Rank
#213
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.039
Recommended model Mercury 2.5 Preview (medium)

Its score stays close to the best score here (6.8 vs 6.9), while costing about 4.0x less than Gemini 3.1 Flash Lite (medium).

Detailed comparison

Metric Gemini 3.1 Flash Lite Gemini 3.1 Flash Lite medium Release: 2026-05-08 Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02
Score 6.9 6.8
Rank #204 #213
Reliability 10.0 10.0
Consistency 9.2 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 59.4% 66.7%
Flaky tests 2 1
Total Runs 69 69
Cost per result 1.177 0.244
Total Cost $0.153 $0.039
Input Price $0.250 / 1M $0.040 / 1M
Output Price $1.500 / 1M $0.150 / 1M
Cache Read Price $0.025 / 1M N/A
Cache Write Price $0.084 / 1M N/A
Total Input Tokens 228,023 397,291
Output Tokens 10,779 6,355
Reasoning Tokens 53,188 143,752
Response Time (avg) 6.27s 6.66s
Response Time (max) 47.78s 74.63s
Response Time (total) 144.10s 153.29s
Parameters ~150B total (~10B active) ~100B
Availability Closed Closed

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

Model generation showcase

Hamster playing table tennis

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

#204 Gemini 3.1 Flash Lite

medium
Cost
$0.003
Time
5.3s
Tokens
1,754 tok

#213 Mercury 2.5 Preview

medium
Cost
$0.001
Time
2.7s
Tokens
2,241 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite 5.5 10.0 33.3% 0 3.81s 8,134 459 8,978
Mercury 2.5 Preview 7.8 10.0 66.7% 0 3.86s 7,839 552 22,126

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