Using DeepSeek V4 Flash 0731 on Vercel AI Gateway

Implementation guide · DeepSeek V4 · DeepSeek

Serverless

Open Source

Vercel AI Gateway exposes DeepSeek V4 Flash 0731 through model ID deepseek/deepseek-v4-flash-0731. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-10-19. Next refresh: weekly.

Quick Start

1
Create an account at Vercel AI Gateway and generate an API key.
2
Use the Vercel AI Gateway SDK or REST API to call deepseek/deepseek-v4-flash-0731 — see the documentation for request format.
3
You'll be billed $0.08/1M input, $0.15/1M output tokens. See full pricing.

API Portal Documentation Pricing Model Card

Code Examples

Install

pip install openai

API key

AI_GATEWAY_API_KEY

Model ID

deepseek/deepseek-v4-flash-0731

creator/model-name e.g. kwaipilot/kat-coder-pro-v2

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["AI_GATEWAY_API_KEY"],
    base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
    model="deepseek/deepseek-v4-flash-0731",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

Pricing on Vercel AI Gateway

Type	Price (per 1M)
Input tokens	$0.08
Output tokens	$0.15

Capabilities

Reasoning

About DeepSeek V4 Flash 0731

DeepSeek V4 Flash 0731 is the official (post-preview) DeepSeek V4 Flash release, launched on the DeepSeek API in public beta on 2026-07-31 with upgraded agent capabilities. DeepSeek says it keeps the same architecture and size as the April preview. MIT-licensed open weights are on Hugging Face as DeepSeek-V4-Flash-0731.

Full model details →

Model Specs

Released2026-07-31

ArchitectureMixture of Experts

Vercel