head-to-head

Anthropic: Claude Sonnet 5.5 vs Anthropic: Claude Opus 5.5 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-29.

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 read up to 1,000,000 tokens at once, roughly 1,500 pages of text.

On our blended benchmark score Claude Opus 5.5 (batch) leads 100.0 to 97.0.

Across the 18 tasks where they differ, Claude Opus 5.5 (batch) on 18 (SQL Generation, Code Review, Code Completion and others).

Pick Claude Opus 5.5 (batch) 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	Anthropic: Claude Sonnet 5.5	Anthropic: Claude Opus 5.5 (batch)
SQL Generation	143	144
Code Review	149	150
Code Completion	119	119
Code Refactoring	150	151
Bug Fixing	153	154
Unit Test Generation	135	135
Code Documentation	137	138
Regex Writing	126	127
CI/CD Pipelines	131	131
Frontend Component Design	133	133
Data Analysis	137	138
CSV / Spreadsheet Cleanup	136	136
ETL Scripting	140	141
OCR / Document Parsing	135	135
Table Extraction from PDFs	135	135
Long-Document Summarization	151	152
Short-Form Summarization	118	118
Blog Post Writing	131	132

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