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OpenAI: gpt-oss-120b vs xAI: Grok 4.20 Beta

Last updated at: 2026-03-12

Metric gpt-oss-120b gpt-oss-120b medium Release: 2025-08-05 Free Available Grok 4.20 Beta Grok 4.20 Beta none Release: 2026-03-12
Rank #43 #52
Avg Score 5.1 4.4
Consistency 7.4 9.1
Cost per result 0.135 2.214
Total Cost $0.010 $0.089
Tests Correct
Attempt pass rate 54.2% 33.3%
Flaky tests 5 2
Total Runs 48 48
Output Tokens 13,210 1,511
Reasoning Tokens 34,230 0
Response Time (avg) 16.65s 1.22s
Response Time (max) 50.92s 6.48s
Response Time (total) 149.88s 19.53s

Top Models by Score

Score vs Total Cost

Response Time (avg)

Avg Score vs Response Time (avg)

Total Output Tokens

Avg Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 7.0 9.8 66.7% 0 19.76s 3,463 2,077
Grok 4.20 Beta 3.3 7.9 22.2% 1 562ms 245 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 10.0 10.0 100.0% 0 31.18s 694 5,072
Grok 4.20 Beta 10.0 10.0 0.0% 0 6.48s 282 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 5.5 5.9 66.7% 1 1.98s 241 1,114
Grok 4.20 Beta 9.9 10.0 100.0% 0 601ms 197 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 10.0 4.4 22.2% 2 50.92s 6,784 20,606
Grok 4.20 Beta 10.0 10.0 0.0% 0 611ms 160 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 3.0 10.0 0.0% 0 7.90s 107 387
Grok 4.20 Beta 5.0 10.0 0.0% 0 541ms 87 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 9.5 10.0 100.0% 0 7.63s 126 1,799
Grok 4.20 Beta 4.5 10.0 0.0% 0 687ms 60 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 1.7 4.7 22.2% 2 11.80s 1,508 2,092
Grok 4.20 Beta 4.0 7.2 55.6% 1 541ms 291 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
gpt-oss-120b 9.0 10.0 100.0% 0 6.91s 287 1,083
Grok 4.20 Beta 10.0 10.0 100.0% 0 4.79s 189 0

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