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Claude Sonnet 5.5 (high) vs DeepSeek V4.1 Flash (max)

The average score is effectively tied at 8.6 vs 8.6. Claude Sonnet 5.5 (high) has the lower benchmark cost at $1.175 vs $1.204. Claude Sonnet 5.5 (high) is faster at 10.79s vs 61.58s, with pass rates of 81.2% vs 69.6%.

Last updated at: 2026-11-13

Compared models

Rank
#103
Total Output Tokens
48,293
Response Time (avg)
10.79s
Total Cost
$1.175
Rank
#98
Total Output Tokens
908,171
Response Time (avg)
61.58s
Total Cost
$1.204
Recommended model Claude Sonnet 5.5 (high)

It has the best score here (8.6), while responding about 5.7x faster than DeepSeek V4.1 Flash (max).

Detailed comparison

Metric Claude Sonnet 5.5 Claude Sonnet 5.5 high Release: 2026-09-29 DeepSeek V4.1 Flash DeepSeek V4.1 Flash max Release: 2026-09-10
Score 8.6 8.6
Rank #103 #98
Reliability 10.0 9.4
Consistency 8.3 9.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 81.2% 69.6%
Flaky tests 5 2
Total Runs 69 69
Cost per result 7.340 3.715
Total Cost $1.175 $1.204
Input Price $2.000 / 1M $0.013 / 1M
Output Price $10.000 / 1M $1.320 / 1M
Cache Read Price $0.200 / 1M $0.013 / 1M
Cache Write Price $2.500 / 1M N/A
Total Input Tokens 345,687 414,054
Output Tokens 13,550 7,635
Reasoning Tokens 34,743 900,536
Response Time (avg) 10.79s 61.58s
Response Time (max) 51.53s 335.08s
Response Time (total) 248.22s 1416.24s
Parameters ~1T total (~100B active) 748B total (16B 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.

#103 Claude Sonnet 5.5

high
Cost
$0.088
Time
73.5s
Tokens
8,914 tok

#98 DeepSeek V4.1 Flash

max
Cost
$0.066
Time
211.0s
Tokens
54,712 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 10.0 10.0 100.0% 0 9.85s 10,608 561 6,326
DeepSeek V4.1 Flash 10.0 10.0 100.0% 0 62.50s 7,509 373 132,357

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