Mistral: Mistral Large 4 vs Anthropic: Claude Opus 5.5 (batch)
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-07.
| Mistral: Mistral Large 4 | Anthropic: Claude Opus 5.5 (batch) | |
|---|---|---|
| Vendor | mistralai | anthropic |
| Quality Score | 100 | 100 |
| Benchmark Score | - | 100.0 |
| Input Price | $0.68/M | $2.00/M |
| Output Price | $2.09/M | $10.00/M |
| Context Window | 524,288 | 1,000,000 |
| Max Output | 262,144 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | - | 95.1 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Mistral Large 4 costs $1.20 and Claude Opus 5.5 (batch) costs $4.50, so Mistral Large 4 is about 3.7 times cheaper for the same work.
Claude Opus 5.5 (batch) reads up to 1,000,000 tokens at once, roughly 1,500 pages of text, against about 786 pages for Mistral Large 4.
Across the 20 tasks where they differ, Mistral Large 4 scores higher on 4 (Code Completion, JSON Extraction, Bulk Data Labeling and others), Claude Opus 5.5 (batch) on 16 (SQL Generation, Code Review, Code Refactoring and others).
Mistral Large 4 was released in October 2026 and Claude Opus 5.5 (batch) in September 2026.
Pick Mistral Large 4 if you need lower cost; pick Claude Opus 5.5 (batch) if you need long documents 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 | Mistral: Mistral Large 4 | Anthropic: Claude Opus 5.5 (batch) |
|---|---|---|
| SQL Generation | 133 | 144 |
| Code Review | 132 | 150 |
| Code Completion | 131 | 119 |
| Code Refactoring | 136 | 151 |
| Bug Fixing | 136 | 154 |
| Unit Test Generation | 124 | 135 |
| Code Documentation | 131 | 138 |
| Regex Writing | 119 | 127 |
| CI/CD Pipelines | 120 | 131 |
| Frontend Component Design | 122 | 133 |
| Data Analysis | 124 | 138 |
| CSV / Spreadsheet Cleanup | 133 | 136 |
| ETL Scripting | 128 | 141 |
| JSON Extraction | 131 | 121 |
| Bulk Data Labeling | 129 | 118 |
| OCR / Document Parsing | 131 | 135 |
| Table Extraction from PDFs | 131 | 135 |
| Long-Document Summarization | 137 | 152 |
| Short-Form Summarization | 123 | 118 |
| Blog Post Writing | 121 | 132 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →