Navigate
Advertise here

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

Claude Opus 5.5 (high) leads on average score with 9.3 vs 9.1. Claude Opus 5.5 (high) has the lower benchmark cost at $1.266 vs $1.546. Claude Opus 5.5 (high) is faster at 25.88s vs 163.90s, with pass rates of 86.4% vs 80.3%.

Last updated at: 2026-09-23

Compared models

Rank
#21
Total Output Tokens
36,457
Response Time (avg)
25.88s
Total Cost
$1.266
Rank
#28
Total Output Tokens
597,236
Response Time (avg)
163.90s
Total Cost
$1.546
Recommended model Claude Opus 5.5 (high)

It has the best score here (9.3), while responding about 6.3x faster than Seed 2.1 Turbo (low).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 high Release: 2026-09-23 Seed 2.1 Turbo Seed 2.1 Turbo low Release: 2026-08-12
Score 9.3 9.1
Rank #21 #28
Reliability 10.0 10.0
Consistency 9.3 9.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 86.4% 80.3%
Flaky tests 2 2
Total Runs 66 66
Cost per result 7.029 9.091
Total Cost $1.266 $1.546
Input Price $4.000 / 1M $0.500 / 1M
Output Price $20.000 / 1M $2.500 / 1M
Total Input Tokens 134,020 104,464
Output Tokens 7,237 6,844
Reasoning Tokens 29,220 590,392
Response Time (avg) 25.88s 163.90s
Response Time (max) 95.95s 739.98s
Response Time (total) 569.33s 3605.87s
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.

#21 Claude Opus 5.5

high
Cost
$0.136
Time
75.6s
Tokens
6,934 tok

#28 Seed 2.1 Turbo

low
Cost
$0.049
Time
298.8s
Tokens
19,730 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 10.0 10.0 100.0% 0 13.44s 10,608 584 5,042
Seed 2.1 Turbo 10.0 10.0 100.0% 0 360.85s 8,220 385 207,368

Quick Compare

Switch Comparison Pair