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Claude Opus 5.5 (medium) vs Seed 2.1 Turbo (high)

Claude Opus 5.5 (medium) leads on average score with 9.0 vs 8.9. Claude Opus 5.5 (medium) has the lower benchmark cost at $1.080 vs $1.797. Claude Opus 5.5 (medium) is faster at 24.18s vs 173.96s, with pass rates of 89.4% vs 78.8%.

Last updated at: 2026-09-23

Compared models

Rank
#30
Total Output Tokens
27,194
Response Time (avg)
24.18s
Total Cost
$1.080
Rank
#40
Total Output Tokens
697,731
Response Time (avg)
173.96s
Total Cost
$1.797
Recommended model Claude Opus 5.5 (medium)

It has the best score here (9.0), while costing about 1.7x less than Seed 2.1 Turbo (high).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 medium Release: 2026-09-23 Seed 2.1 Turbo Seed 2.1 Turbo high Release: 2026-08-12
Score 9.0 8.9
Rank #30 #40
Reliability 10.0 10.0
Consistency 9.6 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 78.8%
Flaky tests 1 3
Total Runs 66 66
Cost per result 5.683 11.230
Total Cost $1.080 $1.797
Input Price $4.000 / 1M $0.500 / 1M
Output Price $20.000 / 1M $2.500 / 1M
Total Input Tokens 133,954 104,695
Output Tokens 7,292 6,645
Reasoning Tokens 19,902 691,086
Response Time (avg) 24.18s 173.96s
Response Time (max) 90.20s 584.71s
Response Time (total) 532.04s 3827.19s
Parameters ~5T total (~500B 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.

#30 Claude Opus 5.5

medium
Cost
$0.053
Time
25.6s
Tokens
2,781 tok

#40 Seed 2.1 Turbo

high
Cost
$0.058
Time
355.4s
Tokens
23,053 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 Opus 5.5 8.4 7.4 88.9% 1 13.50s 10,608 636 4,341
Seed 2.1 Turbo 10.0 10.0 100.0% 0 336.02s 8,220 370 194,578

Quick Compare

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