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Claude Opus 4.8 (medium) vs Seed 2.1 Turbo (high)

The average score is effectively tied at 8.8 vs 8.9. Seed 2.1 Turbo (high) has the lower benchmark cost at $1.641 vs $1.931. Claude Opus 4.8 (medium) is faster at 12.49s vs 162.13s, with pass rates of 84.9% vs 80.3%.

Last updated at: 2026-08-12

Rank
#22
Total Output Tokens
49,841
Response Time (avg)
12.49s
Total Cost
$1.931
Rank
#21
Total Output Tokens
635,380
Response Time (avg)
162.13s
Total Cost
$1.641
Recommended model Claude Opus 4.8 (medium)

It has the best score here (8.8), while responding about 13.0x faster than Seed 2.1 Turbo (high).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Seed 2.1 Turbo Seed 2.1 Turbo high Release: 2026-08-12
Score 8.8 8.9
Rank #22 #21
Reliability 10.0 9.9
Consistency 9.6 8.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 84.9% 80.3%
Flaky tests 1 4
Total Runs 66 66
Cost per result 10.724 10.255
Total Cost $1.931 $1.641
Input Price $5.000 / 1M $0.500 / 1M
Output Price $25.000 / 1M $2.500 / 1M
Total Input Tokens 138,451 104,686
Output Tokens 40,766 6,646
Reasoning Tokens 9,075 628,734
Response Time (avg) 12.49s 162.13s
Response Time (max) 70.54s 584.71s
Response Time (total) 274.72s 3566.76s
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.

#22 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 tok

#21 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 4.8 10.0 10.0 100.0% 0 15.33s 10,590 9,945 1,381
Seed 2.1 Turbo 10.0 10.0 100.0% 0 336.02s 8,220 370 194,578

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