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OpenAI: gpt-oss-120b vs Qwen: Qwen3.5 Plus 2026-04-20

Summary

gpt-oss-120b vs Qwen3.5 Plus 2026-04-20 benchmark comparison: gpt-oss-120b leads on average score with 6.1 vs 5.7. gpt-oss-120b has the lower benchmark cost at $0.013 vs $0.032. Qwen3.5 Plus 2026-04-20 is faster at 4.39s vs 22.28s, with pass rates of 52.4% vs 41.3%.

Recommended model: gpt-oss-120b - It has the best score here (6.1), while costing about 2.6x less than Qwen3.5 Plus 2026-04-20.

Last updated at: 2026-06-10

Metric gpt-oss-120b gpt-oss-120b medium Release: 2025-08-05 Free Available Qwen3.5 Plus 2026-04-20 Qwen3.5 Plus 2026-04-20 none Release: 2026-04-20
Score 6.1 5.7
Rank #100 #115
Reliability 10.0 10.0
Consistency 8.0 8.6
Tests Correct
Attempt pass rate 52.4% 41.3%
Flaky tests 5 4
Total Runs 63 63
Cost per result 0.141 0.595
Total Cost $0.013 $0.032
Input Price $0.039 / 1M $0.300 / 1M
Output Price $0.180 / 1M $1.800 / 1M
Total Input Tokens 39,084 38,910
Output Tokens 20,013 11,145
Reasoning Tokens 50,233 0
Response Time (avg) 22.28s 4.39s
Response Time (max) 68.16s 33.34s
Response Time (total) 311.96s 92.26s

Generation showcase

Hamster playing table tennis

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

#100 gpt-oss-120b

medium
Cost
$0.001
Time
26.7s
Tokens
555 tok

#115 Qwen3.5 Plus 2026-04-20

none
Cost
$0.008
Time
77.0s
Tokens
4,369 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
gpt-oss-120b 6.7 9.9 50.0% 0 10.21s 1,314 3,518 2,177
Qwen3.5 Plus 2026-04-20 4.8 10.0 25.0% 0 1.88s 696 557 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 5.9 7.0 55.6% 1 38.37s 7,782 3,365 11,973
Qwen3.5 Plus 2026-04-20 3.9 7.8 11.1% 1 1.69s 7,913 480 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 10.0 10.0 100.0% 0 31.18s 11,535 694 5,072
Qwen3.5 Plus 2026-04-20 2.8 1.6 33.3% 1 13.32s 11,350 2,275 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 6.4 5.9 66.7% 1 1.98s 7,476 241 1,114
Qwen3.5 Plus 2026-04-20 10.0 10.0 100.0% 0 2.82s 7,794 243 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 2.9 4.4 22.2% 2 50.92s 1,266 6,784 20,606
Qwen3.5 Plus 2026-04-20 5.3 10.0 33.3% 0 4.43s 789 18 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 4.3 10.0 0.0% 0 7.90s 659 107 387
Qwen3.5 Plus 2026-04-20 4.8 10.0 0.0% 0 1.41s 522 119 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 9.9 10.0 100.0% 0 7.63s 1,036 126 1,799
Qwen3.5 Plus 2026-04-20 6.2 5.8 66.7% 1 1.17s 711 68 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 5.3 7.2 44.4% 1 21.71s 1,190 1,790 2,264
Qwen3.5 Plus 2026-04-20 6.7 7.9 55.6% 1 1.97s 714 583 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 9.8 10.0 100.0% 0 6.91s 6,514 287 1,083
Qwen3.5 Plus 2026-04-20 10.0 10.0 100.0% 0 4.42s 8,211 297 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 3.0 10.0 0.0% 0 26.51s 312 3,101 3,758
Qwen3.5 Plus 2026-04-20 3.0 10.0 0.0% 0 33.34s 210 6,505 0

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