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DeepSeek: DeepSeek V4 Pro vs OpenAI: GPT-5.5

Summary

DeepSeek V4 Pro vs GPT-5.5 benchmark comparison: GPT-5.5 leads on average score with 8.8 vs 6.0. DeepSeek V4 Pro has the lower benchmark cost at $0.079 vs $3.679. GPT-5.5 is faster at 37.98s vs 65.21s, with pass rates of 52.4% vs 87.3%.

Recommended model: GPT-5.5 - It has the best score here (8.8), while responding about 1.7x faster than DeepSeek V4 Pro.

Last updated at: 2026-06-04

Metric DeepSeek V4 Pro DeepSeek V4 Pro high Release: 2026-04-24 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 6.0 8.8
Rank #103 #9
Reliability 9.0 10.0
Consistency 7.6 8.9
Tests Correct
Attempt pass rate 52.4% 87.3%
Flaky tests 6 3
Total Runs 63 63
Cost per result 2.869 21.638
Total Cost $0.079 $3.679
Input Price $0.435 / 1M $5.000 / 1M
Output Price $0.870 / 1M $30.000 / 1M
Total Input Tokens 32,240 34,212
Output Tokens 12,250 1,985
Reasoning Tokens 72,257 114,925
Response Time (avg) 65.21s 37.98s
Response Time (max) 358.35s 332.10s
Response Time (total) 1304.19s 797.60s

Generation showcase

Hamster playing table tennis

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

#103 DeepSeek V4 Pro

high
Cost
$0.023
Time
257.6s
Tokens
14,870 tok

#9 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 6.4 7.9 58.3% 1 16.53s 448 71 3,617
GPT-5.5 10.0 10.0 100.0% 0 4.66s 606 250 1,335
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 3.3 6.4 11.1% 1 118.23s 1,966 111 20,940
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 10.0 10.0 100.0% 0 65.02s 14,016 465 5,914
GPT-5.5 10.0 10.0 100.0% 0 19.29s 11,019 312 2,841
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 7.3 5.9 83.3% 1 23.62s 5,633 229 1,710
GPT-5.5 10.0 10.0 100.0% 0 4.18s 7,140 234 593
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 2.9 7.2 11.1% 1 205.66s 430 10,529 28,089
GPT-5.5 5.3 7.2 44.4% 1 164.14s 723 67 79,625
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 6.1 3.1 66.7% 1 25.09s 314 76 1,152
GPT-5.5 10.0 10.0 100.0% 0 4.16s 477 138 223
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 10.0 10.0 100.0% 0 41.16s 627 205 2,416
GPT-5.5 10.0 10.0 100.0% 0 3.36s 660 93 538
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 5.9 7.2 55.6% 1 34.84s 544 139 4,019
GPT-5.5 10.0 10.0 100.0% 0 6.76s 642 241 2,225
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 10.0 10.0 100.0% 0 21.33s 8,079 372 593
GPT-5.5 10.0 10.0 100.0% 0 10.57s 5,445 258 832
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
DeepSeek V4 Pro 3.0 10.0 0.0% 0 39.14s 183 53 3,807
GPT-5.5 2.8 1.6 33.3% 1 37.86s 195 30 1,754

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