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Anthropic: Claude Opus 4.7 vs OpenAI: GPT-5.3-Codex

Last updated at: 2026-04-16

Metric Claude Opus 4.7 Claude Opus 4.7 none Release: 2026-04-16 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Score 9.2 8.6
Rank #4 #7
Consistency 10.0 8.7
Tests Correct
Attempt pass rate 88.9% 83.3%
Flaky tests 0 3
Total Runs 54 54
Cost per result 3.155 4.405
Total Cost $0.505 $0.573
Input Price $5.000 / 1M $1.750 / 1M
Output Price $25.000 / 1M $14.000 / 1M
Output Tokens 6,326 2,279
Reasoning Tokens 0 35,179
Response Time (avg) 3.13s 15.38s
Response Time (max) 18.27s 100.93s
Response Time (total) 56.33s 276.91s

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Score vs Total Cost

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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 4.7 8.3 10.0 75.0% 0 2.12s 522 0
GPT-5.3-Codex 8.7 7.9 91.7% 1 4.16s 240 1,722
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 10.0 10.0 100.0% 0 2.84s 494 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 8.95s 491 1,530
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 9.5 10.0 100.0% 0 18.27s 3,504 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 364 2,731
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 10.0 10.0 100.0% 0 2.15s 324 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.07s 234 728
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 7.7 10.0 66.7% 0 1.19s 78 0
GPT-5.3-Codex 5.9 7.2 55.6% 1 64.31s 64 25,308
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 10.0 10.0 100.0% 0 3.47s 257 0
GPT-5.3-Codex 4.6 10.0 0.0% 0 4.87s 187 331
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 10.0 10.0 100.0% 0 1.46s 114 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 93 693
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 10.0 10.0 100.0% 0 2.58s 661 0
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.12s 352 1,644
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 10.0 10.0 100.0% 0 4.74s 372 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492

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