DeepSeek V4 Pro vs DeepSeek V4 Flash
Facts only. This page does not pick a winner. For a picked winner, see the use case comparison on Tools.
| DeepSeek V4 Pro | DeepSeek V4 Flash | |
|---|---|---|
| API model IDs | deepseek-v4-pro, deepseek-v4-pro-0813 | deepseek-v4-flash, deepseek-v4-flash-0731 |
| Context window | 1,000,000 | 1,000,000 |
| Lifecycle | active | active |
| License | open-weights | open-weights |
| Trains on API data | Yes | Yes |
| Zero data retention | no | no |
| Input per 1M tokens | $1.32 (verified 2026-09-08) | $0.44 (verified 2026-09-08) |
Frequently asked questions
- Which has the larger context window, DeepSeek V4 Pro or DeepSeek V4 Flash?
- DeepSeek V4 Pro holds 1,000,000 tokens and DeepSeek V4 Flash holds 1,000,000. Both hold 1,000,000 tokens. The context window counts the prompt, any attached files, and the reply together.
- Which is cheaper, DeepSeek V4 Pro or DeepSeek V4 Flash?
- Per million input tokens, DeepSeek V4 Pro was $1.32 (verified 2026-09-08) and DeepSeek V4 Flash was $0.44 (verified 2026-09-08). DeepSeek V4 Flash is cheaper per input token. Output tokens cost $3.96 and $1.32 respectively, and output volume usually decides the bill.
- Does DeepSeek V4 Pro or DeepSeek V4 Flash train on API data?
- DeepSeek V4 Pro trains on API data by default, and DeepSeek V4 Flash trains on API data by default. Zero data retention is no for DeepSeek V4 Pro and no for DeepSeek V4 Flash. Verified 2026-09-08 and 2026-09-08 against the providers' own documentation.
- Is DeepSeek V4 Pro or DeepSeek V4 Flash being retired?
- DeepSeek V4 Pro is active. DeepSeek V4 Flash is active. Lifecycle checked 2026-09-08 and 2026-09-08. Pin a dated snapshot ID rather than an alias if a retirement would break you.