DeepSeek V4 API

Name: DeepSeek V4 API
Brand: DeepSeek

$0.3/Mtok in

DeepSeek · text

Open-weight frontier-adjacent reasoning at commodity prices.

Overview

About DeepSeek V4

Open-weight frontier-adjacent reasoning at commodity prices. Every model on CompanyFabric shares the same API key, billing balance, and rate-limit envelope — one integration covers the entire library.

Facts

At a glance

Availability

Live

Pricing

$0.3/Mtok in

Metered exactly per call

Context window

128k tokens

Commercial use

See license

Open weights; commercial use permitted (MIT-style model license).

Variants

All endpoints

DeepSeek V4

$0.3/Mtok in

Open-weight frontier-adjacent reasoning at commodity prices.

Chat Completions

Prompt library

Example runs

Solve and explain: a train leaves at…

Step 1…

This exact run cost $0.001

Quickstart

How to use the DeepSeek V4 API

1
Create a free CompanyFabric account — starter credits are included, no card required.
2
Copy your API key from the dashboard. One key covers every model in the library.
3
Point any OpenAI SDK at api.companyfabric.com/v1 and set model to "deepseek/deepseek-v4".
4
Read the exact metered cost of the call from the response — the same number shown in the playground.

Use cases

What teams build with it

Agents & copilots

Drive agent loops, tool calls, and user-facing assistants over the OpenAI-compatible endpoint.

agentstool useassistants

Content pipelines

Summarization, rewriting, and structured generation at metered per-token cost.

contentsummarization

Extraction & classification

Turn unstructured input into typed JSON with schema-constrained output.

extractionjson mode

Get better output

Prompting tips

State the output format before the task — models follow contracts declared early.
Few-shot beats description: two worked examples outperform a paragraph of rules.
Cap output length explicitly when cost matters; output tokens dominate most bills.

Exact, metered, prepaid

Pricing

Endpoint	Type	Price
DeepSeek V4	Chat	$0.3 / M input · $0.9 / M output

Production-grade

Code samples

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://api.companyfabric.com/v1",
  apiKey: process.env.COMPANYFABRIC_API_KEY,
})

const res = await client.chat.completions.create({
  model: "deepseek/deepseek-v4",
  max_tokens: 1024,
  temperature: 0.7,
  messages: [{ role: "user", content: "Say hello from the fabric." }],
})

console.log(res.choices[0].message.content)

Playground

Try it in the browser

Playground$0.3 in / $0.9 out per 1M tokens

Model

Max output tokens

Prompt

≈ $0.0009

Comparisons

DeepSeek V4 vs the alternatives

DeepSeek V4 vs Gemini 3 Flash

DeepSeek V4 and Gemini 3 Flash compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

DeepSeek V4 vs Claude Haiku 4.5

DeepSeek V4 and Claude Haiku 4.5 compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

FAQ

Frequently asked questions

How much does the DeepSeek V4 API cost?

$0.3 / M input · $0.9 / M output. Every call is metered exactly and shown before you run it.

How do I get a DeepSeek V4 API key?

Create a CompanyFabric account, and one key unlocks DeepSeek V4 and every other model in the library. Free starter credits are included — no subscription, no card required to try it.

Why use DeepSeek V4 on CompanyFabric instead of going direct?

One key, one prepaid balance, and one rate-limit envelope across the whole library, at pricing at parity with or below the direct API. Model switching is a one-line change, and BYOK routing is 0% fee.

Is the API OpenAI-compatible?

Yes — point any OpenAI SDK at api.companyfabric.com/v1 and set model to "deepseek/deepseek-v4".

Can I use the output commercially?

Open weights; commercial use permitted (MIT-style model license).

How does billing work?

Prepaid credits via card, or BYOK with your own provider keys at 0% platform fee. No subscription required; balances never expire.

Provider