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Anthropic: Claude Opus 4.6 vs OpenAI: gpt-oss-120b

Last updated at: 2026-04-29

Metric Claude Opus 4.6 Claude Opus 4.6 medium Release: 2026-02-05 gpt-oss-120b gpt-oss-120b medium Release: 2025-08-05 Free Available
Score 7.6 5.8
Rank #49 #88
Reliability N/A N/A
Consistency 9.1 7.2
Tests Correct
Attempt pass rate 70.4% 51.9%
Flaky tests 2 6
Total Runs 54 54
Cost per result 12.047 0.144
Total Cost $1.446 $0.011
Input Price $5.000 / 1M $0.000 / 1M
Output Price $25.000 / 1M $0.000 / 1M
Output Tokens 29,829 13,493
Reasoning Tokens 18,938 36,879
Response Time (avg) 21.08s 16.08s
Response Time (max) 83.40s 50.92s
Response Time (total) 231.84s 176.88s

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) Output Tokens Reasoning Tokens
Claude Opus 4.6 6.4 5.8 66.7% 2 7.45s 986 1,071
gpt-oss-120b 6.7 9.9 50.0% 0 10.21s 3,518 2,177
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 23.11s 3,486 1,504
gpt-oss-120b 4.3 1.1 66.7% 1 26.33s 228 2,549
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 76.66s 8,178 5,194
gpt-oss-120b 10.0 10.0 100.0% 0 31.18s 694 5,072
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 7.37s 691 757
gpt-oss-120b 6.4 5.9 66.7% 1 1.98s 241 1,114
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 3.0 10.0 0.0% 0 83.40s 14,642 8,687
gpt-oss-120b 2.9 4.4 22.2% 2 50.92s 6,784 20,606
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 5.04s 188 292
gpt-oss-120b 4.3 10.0 0.0% 0 7.90s 107 387
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 2.43s 266 467
gpt-oss-120b 9.9 10.0 100.0% 0 7.63s 126 1,799
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 7.7 10.0 66.7% 0 4.60s 531 637
gpt-oss-120b 3.2 4.7 22.2% 2 11.80s 1,508 2,092
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 9.73s 861 329
gpt-oss-120b 9.8 10.0 100.0% 0 6.91s 287 1,083

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