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Gemini 4 Hydrogen (xhigh) vs GPT-5.5 (medium)

The average score is effectively tied at 9.2 vs 9.2. GPT-5.5 (medium) has the lower benchmark cost at $4.809 vs $8.734. GPT-5.5 (medium) is faster at 39.86s vs 89.92s, with pass rates of 89.9% vs 88.4%.

Last updated at: 2026-11-13

Compared models

Rank
#48
Total Output Tokens
1,039,092
Response Time (avg)
89.92s
Total Cost
$8.734
Rank
#44
Total Output Tokens
130,107
Response Time (avg)
39.86s
Total Cost
$4.809
Recommended model GPT-5.5 (medium)

It has the best score here (9.2), while costing about 1.8x less than Gemini 4 Hydrogen (xhigh).

Detailed comparison

Metric Gemini 4 Hydrogen Gemini 4 Hydrogen xhigh Release: 2026-11-12 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 9.2 9.2
Rank #48 #44
Reliability 9.0 10.0
Consistency 9.1 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 88.4%
Flaky tests 3 3
Total Runs 69 69
Cost per result 45.967 25.306
Total Cost $8.734 $4.809
Input Price $1.500 / 1M $5.000 / 1M
Output Price $7.500 / 1M $30.000 / 1M
Cache Read Price $0.075 / 1M $0.500 / 1M
Cache Write Price $0.084 / 1M N/A
Total Input Tokens 626,965 180,959
Output Tokens 9,003 6,472
Reasoning Tokens 1,030,089 123,635
Response Time (avg) 89.92s 39.86s
Response Time (max) 379.79s 332.10s
Response Time (total) 2068.10s 916.82s
Parameters ~300B total (~15B active) ~1.5T total (~100B active)
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.

#48 Gemini 4 Hydrogen

xhigh
Cost
$0.329
Time
259.1s
Tokens
43,952 tok

#44 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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 4 Hydrogen 10.0 10.0 100.0% 0 86.90s 8,448 485 125,825
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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