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Anthropic: Claude Opus 4.6 vs OpenAI: GPT-5.3 Chat

Last updated at: 2026-06-04

Metric Claude Opus 4.6 Claude Opus 4.6 medium Release: 2026-02-05 GPT-5.3 Chat GPT-5.3 Chat none Release: 2026-03-03
Score 7.0 7.2
Rank #69 #63
Reliability 10.0 10.0
Consistency 8.8 8.1
Tests Correct
Attempt pass rate 61.9% 66.7%
Flaky tests 3 5
Total Runs 63 63
Cost per result 17.103 3.605
Total Cost $2.053 $0.433
Input Price $5.000 / 1M $1.750 / 1M
Output Price $25.000 / 1M $14.000 / 1M
Total Input Tokens 53,227 34,209
Output Tokens 47,446 26,617
Reasoning Tokens 24,000 0
Response Time (avg) 25.89s 6.34s
Response Time (max) 83.40s 18.33s
Response Time (total) 362.49s 133.13s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 6.4 5.8 66.7% 2 7.45s 840 986 1,071
GPT-5.3 Chat 6.7 8.1 58.3% 1 3.86s 606 3,167 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 5.7 7.1 44.4% 1 30.10s 8,522 13,057 4,121
GPT-5.3 Chat 5.6 4.7 55.6% 2 10.52s 7,302 6,632 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 76.66s 20,685 8,178 5,194
GPT-5.3 Chat 10.0 10.0 100.0% 0 11.96s 11,019 2,614 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 7.37s 8,676 691 757
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.21s 7,140 942 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 3.0 10.0 0.0% 0 83.40s 674 14,642 8,687
GPT-5.3 Chat 3.5 4.4 33.3% 2 13.01s 723 8,264 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 5.04s 564 188 292
GPT-5.3 Chat 4.6 10.0 0.0% 0 1.99s 477 319 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 2.43s 792 266 467
GPT-5.3 Chat 9.8 10.0 100.0% 0 3.51s 660 1,491 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 7.7 10.0 66.7% 0 4.71s 816 532 630
GPT-5.3 Chat 10.0 10.0 100.0% 0 2.99s 642 1,758 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 10.0 10.0 100.0% 0 9.73s 11,454 861 329
GPT-5.3 Chat 10.0 10.0 100.0% 0 8.36s 5,445 861 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.6 3.0 10.0 0.0% 0 63.24s 204 8,045 2,452
GPT-5.3 Chat 3.0 10.0 0.0% 0 4.38s 195 569 0

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