# DeepSeek: DeepSeek V3.1

- Model id: `deepseek/deepseek-chat-v3.1`
- Served by: -
- List price per 1M tokens, input / output, from: -, with 0% platform fee. A request is billed at the list price of the host that served it.
- Context: 164K, max output 147K
- Prices read 2026-11-15 09:33 UTC
- Page: https://plaingateway.com/models/deepseek/deepseek-chat-v3.1

DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...

## Hosts

| Host | Endpoint | In / out /M | Cache read /M | Context | Served |
|---|---|---|---|---|---|
| DeepInfra | `deepinfra/fp4` | $0.25 / $0.95 | $0.13 | 164K | no |
| Siliconflow | `siliconflow/fp8` | $0.27 / $1.00 | - | 164K | no |
| Coreweave | `coreweave/fp8` | $0.50 / $1.50 | $0.20 | 161K | no |

## First request

```sh
curl https://api.plaingateway.com/api/v1/chat/completions \
  -H "Authorization: Bearer $PLAINGATEWAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "deepseek/deepseek-chat-v3.1", "messages": [{"role": "user", "content": "Say hello in five words."}]}'
```

Sign up at https://plaingateway.com/signup (no card), create a key, send a test call, and add credits when you want more. New accounts may get a small starting credit. The whole bootstrap for agents: https://plaingateway.com/llms.txt