DeepSeek: DeepSeek V4.1 Flash 1017 vs Anthropic: Claude Haiku 5.5
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-19.
| DeepSeek: DeepSeek V4.1 Flash 1017 | Anthropic: Claude Haiku 5.5 | |
|---|---|---|
| Vendor | deepseek | anthropic |
| Quality Score | 100 | 100 |
| Benchmark Score | - | 72.6 |
| Input Price | $0.15/M | $0.10/M |
| Output Price | $0.60/M | $0.50/M |
| Context Window | 1,048,576 | 1,000,000 |
| Max Output | 393,216 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | - | 71.6 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Claude Haiku 5.5 costs $0.23 and DeepSeek V4.1 Flash 1017 costs $0.30, so Claude Haiku 5.5 is about 1.3 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.
Across the 19 tasks where they differ, Claude Haiku 5.5 on 19 (SQL Generation, Code Review, Code Completion and others).
Pick Claude Haiku 5.5 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 | DeepSeek: DeepSeek V4.1 Flash 1017 | Anthropic: Claude Haiku 5.5 |
|---|---|---|
| SQL Generation | 133 | 142 |
| Code Review | 132 | 145 |
| Code Completion | 131 | 133 |
| Code Refactoring | 136 | 147 |
| Bug Fixing | 136 | 149 |
| Unit Test Generation | 124 | 132 |
| Code Documentation | 131 | 138 |
| Regex Writing | 119 | 127 |
| CI/CD Pipelines | 120 | 128 |
| Frontend Component Design | 122 | 130 |
| Data Analysis | 124 | 134 |
| CSV / Spreadsheet Cleanup | 133 | 136 |
| ETL Scripting | 128 | 138 |
| JSON Extraction | 131 | 131 |
| OCR / Document Parsing | 131 | 134 |
| Table Extraction from PDFs | 131 | 134 |
| Long-Document Summarization | 137 | 149 |
| Short-Form Summarization | 123 | 127 |
| Blog Post Writing | 121 | 130 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →