DeepSeek V3.1 Terminus
by DeepSeekReleased Sep 22, 2025
deepseek/deepseek-v3.1-terminus- Calls tools
- Answers in a JSON schema
- Reasons before it answers
DeepSeek-V3.1 Terminus is an update to DeepSeek V3.1 that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model's...
- Input / 1M tokens
- $0.32
- Output / 1M tokens
- $1.20
- Context
- 164K
- Longest answer
- 147K
What it costs
What each call is charged to the token's AI credit.
| Billed for | You pay |
|---|---|
| Input tokens | $0.32 / 1M |
| Output tokens | $1.20 / 1M |
A typical call
A short chat turn: 2,000 tokens in, 500 out.
- per call
- $0.0012
- calls per $20
- 16K
What it can do
From its listing. The router passes every field through.
- Reads imagesNo
- Reads files and PDFsNo
- Hears audioNo
- Calls toolsYes
- Answers in a JSON schemaYes
- Reasons before it answersYes
- Searches the webNo
- Caches long promptsNo
- Draws imagesNo
Call it
Any router key works, in the format your SDK already speaks.
import OpenAI from "openai";const ai = new OpenAI({ baseURL: "https://relayfor.si/api/v1", apiKey: process.env.RELAYFOR_ROUTER_KEY,});const reply = await ai.chat.completions.create({ model: "deepseek/deepseek-v3.1-terminus", messages: [{ role: "user", content: "Welcome the 1,000th holder in one line." }],});Specifications
What its maker and providers list for it.
- Reads
- Text
- Writes
- Text
- Context
- 163,840 tokens
- Longest answer
- 147,456 tokens
- Intelligence index
- 14.8 (#121 of 220 rated)
- Knowledge cutoff
- Mar 31, 2025
- Released
- Sep 22, 2025
- Moderation
- None
Request fields
The fields its providers accept, passed through as you send them.
- frequency_penalty
- include_reasoning
- max_tokens
- reasoning
- response_format
- stop
- structured_outputs
- temperature
- tool_choice
- tools
- top_k
- top_p
Questions
How much does DeepSeek V3.1 Terminus cost?
$0.32 per million input tokens and $1.20 per million output tokens, paid from the token's AI credit. A call of 2,000 tokens in and 500 out costs about $0.0012.
How do I call DeepSeek V3.1 Terminus?
Make a router key for one of your tokens on the dashboard, point any OpenAI or Anthropic SDK at https://relayfor.si/api/v1 and send the model id deepseek/deepseek-v3.1-terminus. The token's AI credit pays for each call.
How long a prompt can DeepSeek V3.1 Terminus take?
Up to 163,840 tokens of context, and up to 147,456 tokens in one answer.
Are my prompts stored?
No. The RFS Router passes each call through and keeps only its token counts and cost, for the token's usage page.
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