# DeepSeek: DeepSeek V3.1

`deepseek/deepseek-chat-v3.1` — **openrouter** · CHAT

> DeepSeek: DeepSeek V3.1 (deepseek/deepseek-chat-v3.1) is a chat model from openrouter with a 163.8K-token context window; capabilities tools, reasoning; input text; output text.

| Field | Value |
| --- | --- |
| Vendor | openrouter |
| Kind | CHAT |
| Context window | 163,840 tokens |
| Max output tokens | 163,840 tokens |
| Indicative price (US list) | $0.2 in / $0.8 out per 1M tokens (indicative US list — verify with vendor) |
| Input modalities | text |
| Output modalities | text |
| Capabilities | tools, reasoning |
| Knowledge cutoff | 2025-03-31 |
| Sources | committed, litellm, openrouter-api |
| Last verified | 2026-07-24 |

*Part of the [Model Catalog](https://openviglet.github.io/model-catalog/) — [openrouter models](https://openviglet.github.io/model-catalog/models/openrouter/) · [Vendor JSON](https://openviglet.github.io/model-catalog/by-vendor/openrouter.json) · [HTML](https://openviglet.github.io/model-catalog/models/openrouter/deepseek-deepseek-chat-v3.1.html)*