head-to-head

OpenAI: GPT-6.1 Sol (batch) vs Anthropic: Claude Sonnet 5.5 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-30.

	OpenAI: GPT-6.1 Sol (batch)	Anthropic: Claude Sonnet 5.5 (batch)
Vendor	openai	anthropic
Quality Score	100	100
Benchmark Score	89.2	97.0
Input Price	$1.00/M	$1.00/M
Output Price	$5.00/M	$5.00/M
Context Window	1,050,000	1,000,000
Max Output	128,000	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	85.5	92.4

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $2.25 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 Claude Sonnet 5.5 (batch) leads 97.0 to 89.2.

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

Pick Claude Sonnet 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	OpenAI: GPT-6.1 Sol (batch)	Anthropic: Claude Sonnet 5.5 (batch)
SQL Generation	143	144
Code Review	148	149
Code Completion	120	120
Code Refactoring	149	150
Bug Fixing	152	153
Unit Test Generation	134	135
Code Documentation	138	139
Regex Writing	127	128
CI/CD Pipelines	130	131
Frontend Component Design	132	133
Data Analysis	136	137
CSV / Spreadsheet Cleanup	136	137
ETL Scripting	140	140
OCR / Document Parsing	135	135
Table Extraction from PDFs	135	135
Long-Document Summarization	151	152
Short-Form Summarization	119	119
Blog Post Writing	131	132

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