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Seed 2.1 Turbo (high) vs GPT-5.5 (medium)

GPT-5.5 (medium) leads on average score with 9.0 vs 8.9. Seed 2.1 Turbo (high) has the lower benchmark cost at $1.641 vs $4.137. GPT-5.5 (medium) is faster at 38.42s vs 162.13s, with pass rates of 80.3% vs 87.9%.

Last updated at: 2026-08-12

Rank
#21
Total Output Tokens
635,380
Response Time (avg)
162.13s
Total Cost
$1.641
Rank
#17
Total Output Tokens
124,436
Response Time (avg)
38.42s
Total Cost
$4.137
Recommended model GPT-5.5 (medium)

It has the best score here (9.0), while responding about 4.2x faster than Seed 2.1 Turbo (high).

Detailed comparison

Metric Seed 2.1 Turbo Seed 2.1 Turbo high Release: 2026-08-12 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 8.9 9.0
Rank #21 #17
Reliability 9.9 10.0
Consistency 8.6 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 80.3% 87.9%
Flaky tests 4 3
Total Runs 66 66
Cost per result 10.255 22.980
Total Cost $1.641 $4.137
Input Price $0.500 / 1M $5.000 / 1M
Output Price $2.500 / 1M $30.000 / 1M
Total Input Tokens 104,686 80,659
Output Tokens 6,646 5,617
Reasoning Tokens 628,734 118,819
Response Time (avg) 162.13s 38.42s
Response Time (max) 584.71s 332.10s
Response Time (total) 3566.76s 845.35s
Parameters ~200B 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.

#21 Seed 2.1 Turbo

high
Cost
$0.058
Time
355.4s
Tokens
23,053 tok

#17 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
Seed 2.1 Turbo 10.0 10.0 100.0% 0 336.02s 8,220 370 194,578
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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