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

DeepSeek V4.1 Flash (high) leads on average score with 8.7 vs 8.6. DeepSeek V4.1 Flash (high) has the lower benchmark cost at $0.617 vs $1.516. Claude Sonnet 5.5 (xhigh) is faster at 14.98s vs 33.27s, with pass rates of 79.7% vs 75.4%.

Last updated at: 2026-10-24

Compared models

Rank
#75
Total Output Tokens
83,041
Response Time (avg)
14.98s
Total Cost
$1.516
Rank
#64
Total Output Tokens
464,156
Response Time (avg)
33.27s
Total Cost
$0.617
Recommended model DeepSeek V4.1 Flash (high)

It has the best score here (8.7), while costing about 2.5x less than Claude Sonnet 5.5 (xhigh).

Detailed comparison

Metric Claude Sonnet 5.5 Claude Sonnet 5.5 xhigh Release: 2026-09-29 DeepSeek V4.1 Flash DeepSeek V4.1 Flash high Release: 2026-09-10
Score 8.6 8.7
Rank #75 #64
Reliability 10.0 9.7
Consistency 8.7 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 79.7% 75.4%
Flaky tests 4 3
Total Runs 69 69
Cost per result 9.473 1.843
Total Cost $1.516 $0.617
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 342,579 282,490
Output Tokens 12,848 8,621
Reasoning Tokens 70,193 455,535
Response Time (avg) 14.98s 33.27s
Response Time (max) 54.92s 205.53s
Response Time (total) 344.60s 765.12s
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.

#75 Claude Sonnet 5.5

xhigh
Cost
$0.319
Time
258.6s
Tokens
31,969 tok

#64 DeepSeek V4.1 Flash

high
Cost
$0.035
Time
111.0s
Tokens
29,201 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 8.2 7.2 88.9% 1 11.90s 10,608 555 9,501
DeepSeek V4.1 Flash 10.0 10.0 100.0% 0 49.19s 7,509 376 108,285

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