MiniMax: MiniMax M3.1 Flash vs Anthropic: Claude Opus 5.5 (batch)
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-23.
| MiniMax: MiniMax M3.1 Flash | Anthropic: Claude Opus 5.5 (batch) | |
|---|---|---|
| Vendor | minimax | anthropic |
| Quality Score | 100 | 100 |
| Benchmark Score | 71.3 | 100.0 |
| Input Price | $0.15/M | $2.00/M |
| Output Price | $0.60/M | $10.00/M |
| Context Window | 1,048,576 | 1,000,000 |
| Max Output | 524,288 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 70.5 | 95.1 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, MiniMax M3.1 Flash costs $0.30 and Claude Opus 5.5 (batch) costs $4.50, so MiniMax M3.1 Flash is about 15.0 times cheaper for the same work.
Both take in a similar amount of text: 1,048,576 and 1,000,000 tokens, about 1,573 and 1,500 pages.
Only MiniMax M3.1 Flash offers video input.
On our blended benchmark score Claude Opus 5.5 (batch) leads 100.0 to 71.3.
Across the 19 tasks where they differ, MiniMax M3.1 Flash scores higher on 5 (Code Completion, CSV / Spreadsheet Cleanup, JSON Extraction and others), Claude Opus 5.5 (batch) on 14 (SQL Generation, Code Review, Code Refactoring and others).
MiniMax M3.1 Flash was released in October 2026 and Claude Opus 5.5 (batch) in September 2026.
Pick MiniMax M3.1 Flash if you need lower cost or video input; pick Claude Opus 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.
Who wins by task?
| Task | MiniMax: MiniMax M3.1 Flash | Anthropic: Claude Opus 5.5 (batch) |
|---|---|---|
| SQL Generation | 142 | 144 |
| Code Review | 145 | 150 |
| Code Completion | 133 | 119 |
| Code Refactoring | 147 | 151 |
| Bug Fixing | 149 | 154 |
| Unit Test Generation | 132 | 135 |
| Regex Writing | 126 | 127 |
| CI/CD Pipelines | 128 | 131 |
| Frontend Component Design | 130 | 133 |
| Data Analysis | 134 | 138 |
| CSV / Spreadsheet Cleanup | 136 | 136 |
| ETL Scripting | 137 | 141 |
| JSON Extraction | 131 | 121 |
| Bulk Data Labeling | 129 | 118 |
| OCR / Document Parsing | 134 | 135 |
| Table Extraction from PDFs | 134 | 135 |
| Long-Document Summarization | 149 | 152 |
| Short-Form Summarization | 127 | 118 |
| Blog Post Writing | 130 | 132 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →