DeepSeek V4.1 Flash vs DeepSeek V4 Pro 0813: cost per task
DeepSeek V4.1 Flash is cheaper on 14 of 14 tasks and about 13.0x cheaper on average (geometric mean).
| Task | DeepSeek V4.1 Flash | DeepSeek V4 Pro 0813 | Difference |
|---|---|---|---|
| Answer a chat question | 0.09¢ | 1.3¢ | 13.7x |
| Reply to a customer email | 0.03¢ | 0.41¢ | 13.4x |
| Write a 1,500-word blog post | 0.04¢ | 0.61¢ | 13.7x |
| Write 10 product descriptions | 0.04¢ | 0.56¢ | 13.5x |
| Translate 1,000 words | 0.18¢ | 2.4¢ | 13.5x |
| Proofread one page (500 words) | 0.04¢ | 0.57¢ | 13.2x |
| Summarize a 20-page PDF | 0.12¢ | 1.3¢ | 10.2x |
| Extract data from an invoice | 0.04¢ | 0.60¢ | 13.5x |
| Analyze a 200-row spreadsheet | 0.26¢ | 3.5¢ | 13.2x |
| Answer from 5 retrieved documents (RAG) | 0.08¢ | 0.99¢ | 12.2x |
| Classify 100 support tickets | 0.08¢ | 1.1¢ | 13.2x |
| Review 500 lines of code | 0.26¢ | 3.5¢ | 13.2x |
| Write a SQL query | 0.03¢ | 0.43¢ | 13.6x |
| Run a 50-step coding agent | 2.4¢ | 30¢ | 12.6x |
Specs and list prices
| DeepSeek V4.1 Flash | DeepSeek V4 Pro 0813 | |
|---|---|---|
| Input per 1M | $0.072 | $0.66 |
| Output per 1M | $0.14 | $1.98 |
| Cached input per 1M | $0.002 | $0.022 |
| Context | 1M | 1M |
| Providers | 34 | 23 |
| Reasoning | default | default |
| LMArena Text | 1475 | - |
| Released | Sep 10, 2026 | Aug 12, 2026 |
FAQ
Is DeepSeek V4.1 Flash or DeepSeek V4 Pro 0813 cheaper?
DeepSeek V4.1 Flash is cheaper on 14 of 14 tasks and about 13.0x cheaper on average (geometric mean).
How much does DeepSeek V4.1 Flash cost compared to DeepSeek V4 Pro 0813 per token?
DeepSeek V4.1 Flash: $0.072 input and $0.14 output per 1M tokens. DeepSeek V4 Pro 0813: $0.66 input and $1.98 output. Token prices alone mislead - models use different numbers of tokens for the same task, which is what the task table shows.