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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 9.2 vs 9.1. Claude Opus 5.5 (medium) has the lower benchmark cost at $1.804 vs $1.892. Claude Opus 5.5 (medium) is faster at 25.85s vs 170.52s, with pass rates of 89.9% vs 79.7%.

Last updated at: 2026-10-26

Compared models

Rank
#36
Total Output Tokens
32,127
Response Time (avg)
25.85s
Total Cost
$1.804
Rank
#48
Total Output Tokens
707,320
Response Time (avg)
170.52s
Total Cost
$1.892
Recommended model Claude Opus 5.5 (medium)

It has the best score here (9.2), while responding about 6.6x faster 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 9.2 9.1
Rank #36 #48
Reliability 10.0 10.0
Consistency 9.7 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 79.7%
Flaky tests 1 3
Total Runs 69 69
Cost per result 9.016 11.129
Total Cost $1.804 $1.892
Input Price $4.000 / 1M $0.500 / 1M
Output Price $20.000 / 1M $2.500 / 1M
Cache Read Price $0.200 / 1M N/A
Cache Write Price $5.000 / 1M N/A
Total Input Tokens 290,117 246,954
Output Tokens 9,805 8,378
Reasoning Tokens 22,322 698,942
Response Time (avg) 25.85s 170.52s
Response Time (max) 90.20s 584.71s
Response Time (total) 594.63s 3922.04s
Parameters ~5T total (~500B active) ~200B total (~20B 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.

#36 Claude Opus 5.5

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

#48 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

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