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Anthropic: Claude Opus 4.8 (batch) vs OpenAI: GPT-5.5 (batch)

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-30.

Anthropic: Claude Opus 4.8 (batch) OpenAI: GPT-5.5 (batch)
Vendoranthropicopenai
Quality Score100100
Benchmark Score94.392.6
Input Price$2.50/M$2.50/M
Output Price$12.50/M$15.00/M
Context Window1,000,0001,050,000
Max Output128,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index91.990.5
ai_index_agentic77.874.0
ai_index_coding100.0100.0
eqbench83.382.4

Who wins by task?

TaskAnthropic: Claude Opus 4.8 (batch)OpenAI: GPT-5.5 (batch)
SQL Generation 177 176
Code Review 178 177
Code Completion 121 120
Code Refactoring 176 175
Bug Fixing 191 190
Unit Test Generation 161 160
Code Documentation 148 147
Regex Writing 138 137
CI/CD Pipelines 151 150
Frontend Component Design 150 150
Data Analysis 176 175
CSV / Spreadsheet Cleanup 158 158
ETL Scripting 163 163
JSON Extraction 138 137
Bulk Data Labeling 123 122
OCR / Document Parsing 149 149
Table Extraction from PDFs 149 149
Long-Document Summarization 170 169
Short-Form Summarization 123 122
Blog Post Writing 146 145

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

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