Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5 (high) wins overall with a score of 72 vs 22 (50 point difference).GPT-5 (high) wins 4 out of 4 categories.
GPT-5 (high)
90
GPT-OSS 20B
28.8
GPT-5 (high)
85
GPT-OSS 20B
23
GPT-5 (high)
94
GPT-OSS 20B
30
GPT-5 (high)
88
GPT-OSS 20B
28
GPT-5 (high) scores higher overall with 72 vs 22, a difference of 50 points across all benchmarks.
GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 28.8.
GPT-5 (high) leads in coding with an average score of 85 vs 23.
GPT-5 (high) leads in math with an average score of 94 vs 30.
GPT-5 (high) leads in reasoning with an average score of 88 vs 28.