OpenAI: GPT-6 Sol (batch) vs DeepSeek: DeepSeek V4.1 Flash
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-27.
| OpenAI: GPT-6 Sol (batch) | DeepSeek: DeepSeek V4.1 Flash | |
|---|---|---|
| Vendor | openai | deepseek |
| Quality Score | 100 | 100 |
| Benchmark Score | 81.2 | 66.3 |
| Input Price | $1.00/M | $0.04/M |
| Output Price | $5.00/M | $0.29/M |
| Context Window | 1,050,000 | 1,048,576 |
| Max Output | 128,000 | 384,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 78.4 | 65.1 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, DeepSeek V4.1 Flash costs $0.11 and GPT-6 Sol (batch) costs $2.25, so DeepSeek V4.1 Flash is about 20.9 times cheaper for the same work.
Both take in a similar amount of text: 1,050,000 and 1,048,576 tokens, about 1,575 and 1,573 pages.
On our blended benchmark score GPT-6 Sol (batch) leads 81.2 to 66.3.
Across the 20 tasks where they differ, GPT-6 Sol (batch) scores higher on 15 (SQL Generation, Code Review, Code Refactoring and others), DeepSeek V4.1 Flash on 5 (Code Completion, CSV / Spreadsheet Cleanup, JSON Extraction and others).
Pick GPT-6 Sol (batch) if you need benchmark performance or the stronger all-round task scores; pick DeepSeek V4.1 Flash if you need lower cost.
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 | OpenAI: GPT-6 Sol (batch) | DeepSeek: DeepSeek V4.1 Flash |
|---|---|---|
| SQL Generation | 142 | 141 |
| Code Review | 146 | 144 |
| Code Completion | 120 | 133 |
| Code Refactoring | 148 | 146 |
| Bug Fixing | 150 | 148 |
| Unit Test Generation | 133 | 131 |
| Code Documentation | 137 | 137 |
| Regex Writing | 126 | 126 |
| CI/CD Pipelines | 129 | 127 |
| Frontend Component Design | 131 | 129 |
| Data Analysis | 135 | 133 |
| CSV / Spreadsheet Cleanup | 136 | 136 |
| ETL Scripting | 139 | 137 |
| JSON Extraction | 122 | 131 |
| Bulk Data Labeling | 120 | 129 |
| OCR / Document Parsing | 134 | 134 |
| Table Extraction from PDFs | 134 | 134 |
| Long-Document Summarization | 149 | 148 |
| Short-Form Summarization | 118 | 127 |
| Blog Post Writing | 130 | 129 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →