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Gemini 3.1 Pro Preview (medium) vs GPT-5.5 (low)

GPT-5.5 (low) leads on average score with 9.3 vs 9.2. GPT-5.5 (low) has the lower benchmark cost at $1.257 vs $1.352. GPT-5.5 (low) is faster at 10.15s vs 20.62s, with pass rates of 90.9% vs 86.4%.

Last updated at: 2026-09-07

Compared models

Rank
#18
Total Output Tokens
97,238
Response Time (avg)
20.62s
Total Cost
$1.352
Rank
#16
Total Output Tokens
28,540
Response Time (avg)
10.15s
Total Cost
$1.257
Recommended model GPT-5.5 (low)

It has the best score here (9.3), while responding about 2.0x faster than Gemini 3.1 Pro Preview (medium).

Detailed comparison

Metric Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 9.2 9.3
Rank #18 #16
Reliability 10.0 10.0
Consistency 10.0 10.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 90.9% 86.4%
Flaky tests 0 0
Total Runs 66 66
Cost per result 6.758 6.614
Total Cost $1.352 $1.257
Input Price $2.000 / 1M $5.000 / 1M
Output Price $12.000 / 1M $30.000 / 1M
Total Input Tokens 92,296 80,067
Output Tokens 5,232 5,378
Reasoning Tokens 92,006 23,162
Response Time (avg) 20.62s 10.15s
Response Time (max) 88.68s 56.19s
Response Time (total) 329.94s 223.24s
Parameters ~1.2T total (~20B active) ~1.5T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#18 Gemini 3.1 Pro Preview

medium
Cost
$0.115
Time
87.2s
Tokens
9,629 tok

#16 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 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 Pro Preview 7.9 9.9 66.7% 0 40.17s 8,124 435 41,247
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

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