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OpenAI: GPT-5.3-Codex vs OpenAI: gpt-oss-120b

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Last updated at : 2026-02-27 15:16

Summary

Metric OpenAI: GPT-5.3-Codex medium Release: Unknown release date OpenAI: gpt-oss-120b medium Release: Unknown release date Free Available
Rank #7 #25
Score 7.93 5.64
Consistency 8.84 7.55
Cost per result 4.641 0.101
Total Cost $0.465 $0.008
Tests Correct
Wrong Tests 4 7
Attempt pass rate 78.6% 59.5%
Flaky tests 2 4
Output Tokens 1,201 11,407
Reasoning Tokens 30,056 26,106

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 216 1,421
OpenAI: gpt-oss-120b 7.00 9.81 66.7% 0 3,463 2,077
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 234 735
OpenAI: gpt-oss-120b 5.50 5.87 66.7% 1 241 1,114
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 4.00 7.21 55.6% 1 64 25,308
OpenAI: gpt-oss-120b 1.00 4.41 22.2% 2 6,018 18,520
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 9.00 10.00 50.0% 0 93 693
OpenAI: gpt-oss-120b 10.00 10.00 100.0% 0 120 1,770
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 7.00 7.38 77.8% 1 340 1,407
OpenAI: gpt-oss-120b 5.00 7.13 44.4% 1 1,278 1,542
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 254 492
OpenAI: gpt-oss-120b 9.00 9.97 100.0% 0 287 1,083

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