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Claude Sonnet 5.5 (medium) vs LongCat 2.0 (low)

LongCat 2.0 (low) leads on average score with 6.6 vs 6.5. LongCat 2.0 (low) has the lower benchmark cost at $0.630 vs $1.100. Claude Sonnet 5.5 (medium) is faster at 8.03s vs 115.00s, with pass rates of 40.6% vs 55.1%.

Last updated at: 2026-10-17

Compared models

Rank
#222
Total Output Tokens
37,748
Response Time (avg)
8.03s
Total Cost
$1.100
Rank
#217
Total Output Tokens
346,225
Response Time (avg)
115.00s
Total Cost
$0.630
Recommended model Claude Sonnet 5.5 (medium)

Its score stays close to the best score here (6.5 vs 6.6), while responding about 14.3x faster than LongCat 2.0 (low).

Detailed comparison

Metric Claude Sonnet 5.5 Claude Sonnet 5.5 medium Release: 2026-09-29 LongCat 2.0 LongCat 2.0 low Release: 2026-07-20
Score 6.5 6.6
Rank #222 #217
Reliability 10.0 9.9
Consistency 9.7 8.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 40.6% 55.1%
Flaky tests 1 5
Total Runs 69 69
Cost per result 12.221 4.942
Total Cost $1.100 $0.630
Input Price $2.000 / 1M $0.300 / 1M
Output Price $10.000 / 1M $1.200 / 1M
Cache Read Price $0.200 / 1M $0.006 / 1M
Cache Write Price $2.500 / 1M N/A
Total Input Tokens 361,183 262,387
Output Tokens 26,609 7,344
Reasoning Tokens 11,139 338,881
Response Time (avg) 8.03s 115.00s
Response Time (max) 51.18s 560.39s
Response Time (total) 184.80s 2645.11s
Parameters ~1T total (~100B active) 1.6T total (48B active)
Availability Closed Open source

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.

#222 Claude Sonnet 5.5

medium
Cost
$0.024
Time
17.4s
Tokens
2,525 tok

#217 LongCat 2.0

low
Cost
$0.024
Time
428.0s
Tokens
19,557 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 Sonnet 5.5 3.4 9.7 0.0% 0 6.07s 10,608 6,767 0
LongCat 2.0 6.6 4.6 77.8% 2 479.30s 6,544 461 206,627

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