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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 medium Release: 2026-04-16 GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05
Score 9.2 8.6
Rank #3 #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 2.790 4.405
Total Cost $0.447 $0.573
Input Price $5.000 / 1M $1.750 / 1M
Output Price $25.000 / 1M $14.000 / 1M
Output Tokens 5,375 2,279
Reasoning Tokens 1,341 35,179
Response Time (avg) 3.53s 15.38s
Response Time (max) 21.45s 100.93s
Response Time (total) 60.03s 276.91s

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Score vs Total Cost

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Score vs Response Time (avg)

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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 1.85s 348 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 6.41s 1,141 257
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 10.0 10.0 100.0% 0 21.45s 2,369 1,084
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 2.37s 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 1.17s 51 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 2.87s 256 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 1.57s 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 2.51s 399 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 4.17s 373 0
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492

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