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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 2026-08-13.

OpenAI: GPT-5.6 Terra Anthropic: Claude Opus 4.8 (batch)
Vendoropenaianthropic
Quality Score100100
Benchmark Score92.794.7
Input Price$1.00/M$2.50/M
Output Price$6.00/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_index93.394.6
ai_index_agentic82.881.5
ai_index_coding100.0100.0
eqbench-83.3

Who wins by task?

TaskOpenAI: GPT-5.6 TerraAnthropic: Claude Opus 4.8 (batch)
SQL Generation 173 178
Code Review 169 179
Code Completion 120 121
Code Refactoring 165 176
Bug Fixing 183 193
Unit Test Generation 155 161
Code Documentation 143 148
Regex Writing 136 138
CI/CD Pipelines 146 151
Frontend Component Design 148 151
Data Analysis 173 178
CSV / Spreadsheet Cleanup 154 158
ETL Scripting 155 164
JSON Extraction 140 138
Bulk Data Labeling 125 123
OCR / Document Parsing 147 149
Table Extraction from PDFs 147 149
Long-Document Summarization 161 171
Short-Form Summarization 123 123
Blog Post Writing 141 146

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

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