DeepSeek V3.1 pricing
DeepSeek V3.1 from DeepSeek costs $0.250 per 1M input tokens and $0.950 per 1M output tokens. Cached input is $0.130 per 1M. Context window 163,840 tokens.
API id deepseek-chat-v3.1 · DeepSeek · source · updated 2026-08-11
$0.250
Input / 1M tokens
$0.950
Output / 1M tokens
$0.130
Cached input / 1M
164K
Context window
What DeepSeek V3.1 costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.0007 |
| Document summary | 50,000 | 2,000 | $0.01 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $0.44 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does DeepSeek V3.1 cost per 1M tokens?
- DeepSeek V3.1 costs $0.250 per 1M input tokens and $0.950 per 1M output tokens on the standard tier. Cached input is $0.130 per 1M.
- What is DeepSeek V3.1's context window?
- DeepSeek V3.1 accepts up to 163,840 tokens in a single request, and can return up to 32,768 output tokens.
- Is there a cheaper DeepSeek model than DeepSeek V3.1?
- Yes. DeepSeek V4 Flash 0423 is $0.140 per 1M input tokens versus $0.250 for DeepSeek V3.1, with a 1,048,576 token context window.
- Where does this DeepSeek V3.1 price come from?
- From the OpenRouter catalogue, because DeepSeek does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from DeepSeek's own — verify before committing spend.