DeepSeek · Single modalityReleased 2025-08-21

deepseek-v3.1

deepseek/deepseek-v3.1 id

DeepSeek-V3.1 is post-trained on the top of DeepSeek-V3.1-Base, which is built upon the original V3 base checkpoint through a two-phase long context extension approach, following the methodology outlined in the original DeepSeek-V3 report. DeepSeek has expanded their dataset by collecting additional long documents and substantially extending both training phases.

ReasoningTool use

Type

Use deepseek-v3.1

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'deepseek/deepseek-v3.1',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

163.8K

CONTEXT WINDOW

8.2K

MAX OUTPUT

$0.616/M

INPUT · PER M

$1.85/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$0.616/M
Output	$1.85/M
Cache read	$0.308/M

Honest list pricesHow we calculate prices

Other DeepSeek models

See all 8

Model

Input

Output

Context

Type

FAQ · DEEPSEEK-V3.1

Frequently asked

01 / 04

How do I call deepseek-v3.1 from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘deepseek/deepseek-v3.1’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does deepseek-v3.1 cost?

Input: $0.616/M per million tokens. Output: $1.85/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for deepseek-v3.1?

deepseek-v3.1 supports a context window of 163.8K tokens, with a maximum output of 8.2K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try deepseek-v3.1 in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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