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Claude Sonnet 5.5 (medium) vs Seed 2.1 Turbo

Seed 2.1 Turbo leads on average score with 5.9 vs 5.7. Seed 2.1 Turbo has the lower benchmark cost at $0.092 vs $0.672. Claude Sonnet 5.5 (medium) is faster at 6.07s vs 6.84s, with pass rates of 37.9% vs 54.6%.

Last updated at: 2026-09-29

Compared models

Rank
#266
Total Output Tokens
32,980
Response Time (avg)
6.07s
Total Cost
$0.672
Rank
#261
Total Output Tokens
10,643
Response Time (avg)
6.84s
Total Cost
$0.092
Recommended model Seed 2.1 Turbo

It has the best score here (5.9), while costing about 7.4x less than Claude Sonnet 5.5 (medium).

Detailed comparison

Metric Claude Sonnet 5.5 Claude Sonnet 5.5 medium Release: 2026-09-29 Seed 2.1 Turbo Seed 2.1 Turbo none Release: 2026-08-12
Score 5.7 5.9
Rank #266 #261
Reliability 10.0 10.0
Consistency 9.7 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 37.9% 54.6%
Flaky tests 1 3
Total Runs 66 66
Cost per result 8.392 0.912
Total Cost $0.672 $0.092
Input Price $2.000 / 1M $0.500 / 1M
Output Price $10.000 / 1M $2.500 / 1M
Total Input Tokens 170,771 129,150
Output Tokens 23,185 10,643
Reasoning Tokens 9,795 0
Response Time (avg) 6.07s 6.84s
Response Time (max) 26.16s 55.92s
Response Time (total) 133.62s 150.46s
Parameters ~1T total (~100B active) ~200B total (~20B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#266 Claude Sonnet 5.5

medium
Cost
$0.024
Time
17.4s
Tokens
2,525 tok

#261 Seed 2.1 Turbo

none
Cost
$0.093
Time
517.1s
Tokens
37,102 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
Claude Sonnet 5.5 3.4 9.7 0.0% 0 6.07s 10,608 6,767 0
Seed 2.1 Turbo 4.5 7.9 22.2% 1 2.35s 8,211 608 0

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