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OpenAI: gpt-oss-120b vs Qwen: Qwen3.5-Flash

Summary

gpt-oss-120b vs Qwen3.5-Flash benchmark comparison: Qwen3.5-Flash leads on average score with 6.8 vs 6.7. gpt-oss-120b has the lower benchmark cost at $0.011 vs $0.080. gpt-oss-120b is faster at 22.28s vs 63.29s, with pass rates of 52.4% vs 71.4%.

Recommended model: gpt-oss-120b - Its score stays close to the best score here (6.7 vs 6.8), while costing about 8.0x less than Qwen3.5-Flash.

Last updated at: 2026-07-02

Metric gpt-oss-120b gpt-oss-120b medium Release: 2025-08-05 Free Available Qwen3.5-Flash Qwen3.5-Flash medium Release: 2026-02-24
Score 6.7 6.8
Rank #81 #73
Reliability 10.0 10.0
Consistency 8.0 8.1
Tests Correct
Attempt pass rate 52.4% 71.4%
Flaky tests 5 5
Total Runs 63 63
Cost per result 0.141 0.871
Total Cost $0.011 $0.080
Input Price $0.030 / 1M $0.065 / 1M
Output Price $0.150 / 1M $0.260 / 1M
Total Input Tokens 39,084 38,926
Output Tokens 20,013 2,088
Reasoning Tokens 50,233 294,598
Response Time (avg) 22.28s 63.29s
Response Time (max) 68.16s 234.29s
Response Time (total) 311.96s 1265.85s

Generation showcase

Hamster playing table tennis

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

#81 gpt-oss-120b

medium
Cost
$0.001
Time
26.7s
Tokens
555 tok

#73 Qwen3.5-Flash

medium
Cost
$0.002
Time
25.8s
Tokens
4,294 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-Flash 10.0 10.0 100.0% 0 59.11s 672 383 32,992
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-Flash 3.7 7.2 22.2% 1 58.87s 6,685 302 90,081
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-Flash 10.0 10.0 100.0% 0 17.78s 14,934 483 8,270
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-Flash 7.3 5.9 83.3% 1 56.99s 6,061 235 16,237
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-Flash 5.3 7.2 44.4% 1 146.50s 581 58 43,615
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-Flash 6.1 3.1 66.7% 1 40.05s 516 99 38,486
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-Flash 10.0 10.0 100.0% 0 63.49s 699 98 14,139
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-Flash 8.2 7.2 88.9% 1 27.61s 381 89 12,457
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-Flash 10.0 10.0 100.0% 0 10.33s 8,193 309 1,284
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-Flash 3.0 10.0 0.0% 0 48.98s 204 32 37,037

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