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GPT 5.3 Chat vs Qwen3.5-27B (medium)

The average score is effectively tied at 7.5 vs 7.5. GPT 5.3 Chat has the lower benchmark cost at $0.533 vs $0.982. GPT 5.3 Chat is faster at 6.56s vs 113.28s, with pass rates of 65.2% vs 75.8%.

Last updated at: 2026-09-10

Compared models

Rank
#105
Total Output Tokens
28,179
Response Time (avg)
6.56s
Total Cost
$0.533
Rank
#107
Total Output Tokens
614,909
Response Time (avg)
113.28s
Total Cost
$0.982
Recommended model GPT 5.3 Chat

It has the best score here (7.5), while costing about 1.8x less than Qwen3.5-27B (medium).

Detailed comparison

Metric GPT 5.3 Chat GPT 5.3 Chat none Release: 2026-03-03 Qwen3.5-27B Qwen3.5-27B medium Release: 2026-02-24
Score 7.5 7.5
Rank #105 #107
Reliability 10.0 10.0
Consistency 8.6 7.8
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 65.2% 75.8%
Flaky tests 4 6
Total Runs 66 66
Cost per result 4.097 8.217
Total Cost $0.533 $0.982
Input Price $1.750 / 1M $0.195 / 1M
Output Price $14.000 / 1M $1.560 / 1M
Total Input Tokens 78,846 111,644
Output Tokens 28,179 16,113
Reasoning Tokens 0 598,796
Response Time (avg) 6.56s 113.28s
Response Time (max) 18.33s 1026.43s
Response Time (total) 137.77s 2492.26s
Parameters ~400B total (~17B active) 27B
Availability Closed Open source

Model generation showcase

Hamster playing table tennis

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

#105 GPT 5.3 Chat

none
Cost
$0.008
Time
8.1s
Tokens
634 tok

#107 Qwen3.5-27B

medium
Cost
$0.008
Time
62.0s
Tokens
3,099 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
GPT 5.3 Chat 5.6 4.7 55.6% 2 10.52s 7,302 6,632 0
Qwen3.5-27B 6.2 7.1 55.6% 1 160.69s 7,895 6,381 89,388

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