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DeepSeek: DeepSeek V4 Flash vs OpenAI: GPT-5.6 Luna

DeepSeek V4 Flash (high) leads on average score with 7.7 vs 7.6. DeepSeek V4 Flash (high) has the lower benchmark cost at $0.042 vs $0.352. GPT-5.6 Luna (medium) is faster at 7.28s vs 49.75s, with pass rates of 72.7% vs 65.2%.

Recommended modelDeepSeek V4 Flash (high)It has the best score here (7.7), while costing about 8.4x less than GPT-5.6 Luna (medium).

Last updated at: 2026-07-17

Metric DeepSeek V4 Flash DeepSeek V4 Flash high Release: 2026-04-24 GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09
Score 7.7 7.6
Rank #43 #48
Reliability 10.0 10.0
Consistency 8.2 9.6
Tests Correct
Attempt pass rate 72.7% 65.2%
Flaky tests 5 1
Total Runs 66 66
Cost per result 0.402 2.513
Total Cost $0.042 $0.352
Input Price $0.098 / 1M $1.000 / 1M
Output Price $0.196 / 1M $6.000 / 1M
Total Input Tokens 108,392 89,676
Output Tokens 14,478 5,699
Reasoning Tokens 153,687 37,980
Response Time (avg) 49.75s 7.28s
Response Time (max) 218.13s 29.85s
Response Time (total) 1094.41s 160.27s

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#43 DeepSeek V4 Flash

high
Cost
$0.003
Time
93.1s
Tokens
7,926 tok

#48 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 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
DeepSeek V4 Flash 7.8 10.0 66.7% 0 50.60s 7,279 395 34,862
GPT-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928

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