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OpenAI: GPT-5.4 Nano vs Anthropic: Claude Sonnet 4.6

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

OpenAI: GPT-5.4 Nano Anthropic: Claude Sonnet 4.6
Vendoropenaianthropic
Quality Score100100
Benchmark Score31.569.7
Input Price$0.20/M$3.00/M
Output Price$1.25/M$15.00/M
Context Window400,0001,000,000
Max Output128,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index34.249.6
aider_polyglot-61.3
eqbench-80.0

Who wins by task?

TaskOpenAI: GPT-5.4 NanoAnthropic: Claude Sonnet 4.6
SQL Generation 138 154
Code Review 138 161
Code Completion 132 120
Code Refactoring 141 162
Bug Fixing 142 166
Unit Test Generation 128 144
Code Documentation 134 142
Regex Writing 123 129
CI/CD Pipelines 124 138
Frontend Component Design 126 137
Data Analysis 129 147
CSV / Spreadsheet Cleanup 135 145
ETL Scripting 132 150
JSON Extraction 131 125
Bulk Data Labeling 129 118
OCR / Document Parsing 132 140
Table Extraction from PDFs 132 140
Long-Document Summarization 143 161
Short-Form Summarization 125 118
Blog Post Writing 126 137

Scores reflect capability match + benchmark data + pricing for each task. Methodology →

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