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

Seed 2.1 Turbo (low) leads on average score with 9.3 vs 9.2. Seed 2.1 Turbo (low) has the lower benchmark cost at $1.645 vs $1.804. Claude Opus 5.5 (medium) is faster at 25.85s vs 161.25s, with pass rates of 89.9% vs 81.2%.

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
#34
Total Output Tokens
609,333
Response Time (avg)
161.25s
Total Cost
$1.645
Recommended model Claude Opus 5.5 (medium)

Its score stays close to the best score here (9.2 vs 9.3), while responding about 6.2x faster than Seed 2.1 Turbo (low).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 medium Release: 2026-09-23 Seed 2.1 Turbo Seed 2.1 Turbo low Release: 2026-08-12
Score 9.2 9.3
Rank #36 #34
Reliability 10.0 10.0
Consistency 9.7 9.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 81.2%
Flaky tests 1 2
Total Runs 69 69
Cost per result 9.016 9.135
Total Cost $1.804 $1.645
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 290,117 241,855
Output Tokens 9,805 8,387
Reasoning Tokens 22,322 600,946
Response Time (avg) 25.85s 161.25s
Response Time (max) 90.20s 739.98s
Response Time (total) 594.63s 3708.70s
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

#34 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 8.4 7.4 88.9% 1 13.50s 10,608 636 4,341
Seed 2.1 Turbo 10.0 10.0 100.0% 0 360.85s 8,220 385 207,368

Quick Compare

Switch Comparison Pair

Claude Opus 5.5mediumvsMuse Spark OpenhighClaude Opus 5.5mediumvsDeepSeek V4.1 Flash 1017lowSeed 2.1 TurbolowvsMuse Spark OpenhighSeed 2.1 TurbolowvsMuse WondermediumClaude Opus 5.5mediumvsQwen3.8 Max (0902)highSeed 2.1 TurbolowvsGPT-6.1 TerraxhighSeed 2.1 TurbolowvsGPT-5.5mediumClaude Opus 5.5mediumvsMuse Spark 1.3highClaude Sonnet 5.5maxvsSeed 2.1 TurbolowSeed 2.1 TurbolowvsQwen3.8 MAXmediumClaude Opus 5.5mediumvsMuse WonderlowClaude Opus 5mediumvsSeed 2.1 Turbolow