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Anthropic: Claude Opus 4.6 vs OpenAI: GPT-5 Nano

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

Summary

Metric Anthropic: Claude Opus 4.6 medium Release: Unknown release date OpenAI: GPT-5 Nano medium Release: Unknown release date
Rank #20 #23
Score 6.07 5.86
Consistency 8.80 6.60
Cost per result 10.992 0.519
Total Cost $0.880 $0.037
Tests Correct
Wrong Tests 6 7
Attempt pass rate 61.9% 69.1%
Flaky tests 2 6
Output Tokens 19,576 3,700
Reasoning Tokens 11,081 85,184

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 4.00 4.41 55.6% 2 897 1,000
OpenAI: GPT-5 Nano 7.00 9.99 66.7% 0 1,107 19,968
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 10.00 10.00 100.0% 0 668 763
OpenAI: GPT-5 Nano 5.50 5.81 83.3% 1 426 8,576
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 1.00 10.00 0.0% 0 16,328 7,928
OpenAI: GPT-5 Nano 4.00 4.41 55.6% 2 195 33,600
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 9.50 9.99 100.0% 0 266 468
OpenAI: GPT-5 Nano 7.00 6.41 83.3% 1 360 4,032
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 7.00 10.00 66.7% 0 556 593
OpenAI: GPT-5 Nano 4.67 4.90 55.6% 2 1,054 12,032
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 10.00 10.00 100.0% 0 861 329
OpenAI: GPT-5 Nano 10.00 10.00 100.0% 0 558 6,976

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