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OpenAI: GPT-5.6 Terra vs Anthropic: Claude Opus 4.8 (batch)

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

OpenAI: GPT-5.6 Terra Anthropic: Claude Opus 4.8 (batch)
Vendoropenaianthropic
Quality Score100100
Benchmark Score91.994.3
Input Price$1.25/M$2.50/M
Output Price$7.50/M$12.50/M
Context Window1,050,0001,000,000
Max Output128,000128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index90.791.9
ai_index_agentic78.277.8
ai_index_coding100.0100.0
eqbench-83.3

Who wins by task?

TaskOpenAI: GPT-5.6 TerraAnthropic: Claude Opus 4.8 (batch)
SQL Generation 172 177
Code Review 168 178
Code Completion 120 121
Code Refactoring 165 176
Bug Fixing 181 191
Unit Test Generation 155 161
Code Documentation 142 148
Regex Writing 136 138
CI/CD Pipelines 145 151
Frontend Component Design 147 150
Data Analysis 171 176
CSV / Spreadsheet Cleanup 154 158
ETL Scripting 155 163
JSON Extraction 139 138
Bulk Data Labeling 125 123
OCR / Document Parsing 147 149
Table Extraction from PDFs 147 149
Long-Document Summarization 160 170
Short-Form Summarization 123 123
Blog Post Writing 140 146

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

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