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

Last updated at: 2026-05-29

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 8.9 8.3
Rank #7 #17
Reliability 10.0 10.0
Consistency 10.0 8.4
Tests Correct
Attempt pass rate 85.0% 81.7%
Flaky tests 0 4
Total Runs 60 60
Cost per result 3.670 4.887
Total Cost $0.624 $0.685
Input Price $5.000 / 1M $1.750 / 1M
Output Price $25.000 / 1M $14.000 / 1M
Output Tokens 10,439 2,336
Reasoning Tokens 2,198 42,565
Response Time (avg) 4.48s 15.95s
Response Time (max) 23.18s 100.93s
Response Time (total) 85.21s 319.08s

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 4.7 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 14.79s 6,210 1,114
GPT-5.3-Codex 10.0 10.0 100.0% 0 18.45s 514 7,266
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 2.43s 370 0
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.05s 356 1,593
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
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.7 3.0 10.0 0.0% 0 2.25s 24 0
GPT-5.3-Codex 2.8 1.6 33.3% 1 14.43s 30 1,701

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