DeepSeek V4 Pro 0813 vs Qwen3.8 Flash: cost per task
Qwen3.8 Flash is cheaper on 12 of 14 tasks and about 4.4x cheaper on average (geometric mean).
| Task | DeepSeek V4 Pro 0813 | Qwen3.8 Flash | Difference |
|---|---|---|---|
| Answer a chat question | 1.3¢ | 0.08¢ | 16.4x |
| Reply to a customer email | 0.41¢ | 0.04¢ | 11.0x |
| Write a 1,500-word blog post | 0.61¢ | 0.75¢ | 1.2x |
| Write 10 product descriptions | 0.56¢ | 0.76¢ | 1.4x |
| Translate 1,000 words | 2.4¢ | 0.08¢ | 29.4x |
| Proofread one page (500 words) | 0.57¢ | 0.10¢ | 5.8x |
| Summarize a 20-page PDF | 1.3¢ | 0.32¢ | 3.9x |
| Extract data from an invoice | 0.60¢ | 0.11¢ | 5.4x |
| Analyze a 200-row spreadsheet | 3.5¢ | 0.85¢ | 4.1x |
| Answer from 5 retrieved documents (RAG) | 0.99¢ | 0.19¢ | 5.1x |
| Classify 100 support tickets | 1.1¢ | 0.42¢ | 2.5x |
| Review 500 lines of code | 3.5¢ | 0.83¢ | 4.2x |
| Write a SQL query | 0.43¢ | 0.13¢ | 3.4x |
| Run a 50-step coding agent | 30¢ | 9.2¢ | 3.3x |
Specs and list prices
| DeepSeek V4 Pro 0813 | Qwen3.8 Flash | |
|---|---|---|
| Input per 1M | $0.66 | $0.15 |
| Output per 1M | $1.98 | $0.47 |
| Cached input per 1M | $0.022 | $0.016 |
| Context | 1M | 1M |
| Providers | 23 | 2 |
| Reasoning | default | none |
| LMArena Text | - | - |
| Released | Aug 12, 2026 | Aug 26, 2026 |
FAQ
Is DeepSeek V4 Pro 0813 or Qwen3.8 Flash cheaper?
Qwen3.8 Flash is cheaper on 12 of 14 tasks and about 4.4x cheaper on average (geometric mean).
How much does DeepSeek V4 Pro 0813 cost compared to Qwen3.8 Flash per token?
DeepSeek V4 Pro 0813: $0.66 input and $1.98 output per 1M tokens. Qwen3.8 Flash: $0.15 input and $0.47 output. Token prices alone mislead - models use different numbers of tokens for the same task, which is what the task table shows.