head-to-head

OpenAI: GPT-5.6 Sol vs Anthropic: Claude Sonnet 5

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-02.

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $4.50 at current list prices.

Both take in a similar amount of text: 1,050,000 and 1,000,000 tokens, about 1,575 and 1,500 pages.

On our blended benchmark score GPT-5.6 Sol leads 80.2 to 63.9.

Across the 18 tasks where they differ, GPT-5.6 Sol scores higher on 18 (SQL Generation, Code Review, Code Completion and others).

GPT-5.6 Sol was released in July 2026 and Claude Sonnet 5 in June 2026.

Pick GPT-5.6 Sol if you need benchmark performance or the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.

Task	OpenAI: GPT-5.6 Sol	Anthropic: Claude Sonnet 5
SQL Generation	142	140
Code Review	146	144
Code Completion	119	118
Code Refactoring	148	146
Bug Fixing	150	148
Unit Test Generation	133	131
Code Documentation	136	135
Regex Writing	125	123
CI/CD Pipelines	129	127
Frontend Component Design	131	129
Data Analysis	135	133
CSV / Spreadsheet Cleanup	135	135
ETL Scripting	138	136
OCR / Document Parsing	134	134
Table Extraction from PDFs	134	134
Long-Document Summarization	149	146
Short-Form Summarization	117	116
Blog Post Writing	130	128

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