Anthropic: Claude Opus 5 (batch) vs OpenAI: GPT-5.6 Terra
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Anthropic: Claude Opus 5 (batch) | OpenAI: GPT-5.6 Terra | |
|---|---|---|
| Vendor | anthropic | openai |
| Quality Score | 100 | 100 |
| Benchmark Score | - | 93.0 |
| Input Price | $2.50/M | $2.00/M |
| Output Price | $12.50/M | $12.00/M |
| Context Window | 1,000,000 | 1,050,000 |
| Max Output | 128,000 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | - | 90.7 |
| ai_index_agentic | - | 78.2 |
| ai_index_coding | - | 100.0 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, GPT-5.6 Terra costs $5.00 and Claude Opus 5 (batch) costs $5.62, so GPT-5.6 Terra is slightly cheaper for the same work.
Both take in a similar amount of text: 1,000,000 and 1,050,000 tokens, about 1,500 and 1,575 pages.
Across the 20 tasks where they differ, GPT-5.6 Terra on 20 (SQL Generation, Code Review, Code Completion and others).
Pick GPT-5.6 Terra if you need lower cost 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.
Who wins by task?
| Task | Anthropic: Claude Opus 5 (batch) | OpenAI: GPT-5.6 Terra |
|---|---|---|
| SQL Generation | 132 | 171 |
| Code Review | 132 | 168 |
| Code Completion | 117 | 119 |
| Code Refactoring | 136 | 165 |
| Bug Fixing | 136 | 181 |
| Unit Test Generation | 124 | 155 |
| Code Documentation | 129 | 141 |
| Regex Writing | 117 | 135 |
| CI/CD Pipelines | 120 | 145 |
| Frontend Component Design | 122 | 147 |
| Data Analysis | 124 | 171 |
| CSV / Spreadsheet Cleanup | 132 | 153 |
| ETL Scripting | 128 | 155 |
| JSON Extraction | 121 | 138 |
| Bulk Data Labeling | 117 | 123 |
| OCR / Document Parsing | 131 | 147 |
| Table Extraction from PDFs | 131 | 147 |
| Long-Document Summarization | 136 | 159 |
| Short-Form Summarization | 113 | 122 |
| Blog Post Writing | 120 | 140 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →