DeepSeek V4 Flash API — pricing & specs

DeepSeek V4 Flash is a text model from DeepSeek with a maker-documented 1M-token context window. On KeepRouter, DeepSeek V4 Flash costs $0.1400 per 1M input tokens and $0.2800 per 1M output tokens, billed pay-as-you-go with no monthly fee. Call it through a compatible KeepRouter endpoint supported by its active route, with the model id deepseek-v4-flash.

How pricing works for DeepSeek V4 Flash

DeepSeek V4 Flash is billed per token — $0.1400 per 1M input tokens and $0.2800 per 1M output tokens, with cached input at $0.002800 per 1M tokens. The published price is pay-as-you-go, with no monthly fee; actual request cost depends on measured token usage.

Calling DeepSeek V4 Flash on KeepRouter

Point a compatible client at the supported KeepRouter endpoint and set the model to deepseek-v4-flash. KeepRouter preserves the client-facing request shape while handling upstream routing or translation. Use POST /v1/chat/completions or, on compatible chat routes, POST /v1/messages; streaming and tool support depend on the model's active route.

cURL

curl https://keeprouter.com/v1/chat/completions \
  -H "Authorization: Bearer $KEEPROUTER_KEY" -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4-flash","messages":[{"role":"user","content":"Hello"}]}'

Python

from openai import OpenAI
client = OpenAI(base_url="https://keeprouter.com/v1", api_key="$KEEPROUTER_KEY")
r = client.chat.completions.create(model="deepseek-v4-flash", messages=[{"role":"user","content":"Hello"}])

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://keeprouter.com/v1", apiKey: process.env.KEEPROUTER_KEY });
const r = await client.chat.completions.create({ model: "deepseek-v4-flash", messages: [{ role: "user", content: "Hello" }] });

Source and verification boundary

Official DeepSeek V4 Flash documentation. KeepRouter's live catalog is authoritative for the customer price and enabled endpoint shown here; the maker remains authoritative for upstream model capabilities and limits.

Guides

• Call DeepSeek V4 Flash with the OpenAI SDK
• Use DeepSeek V4 Flash in Claude Code

Related models

• DeepSeek V4 Pro by DeepSeek — $0.4350 per 1M input tokens and $0.8700 per 1M output tokens
• DeepSeek V3.2 by DeepSeek — $0.2288 per 1M input tokens and $0.3432 per 1M output tokens
• DeepSeek V3.1 by DeepSeek — $0.2100 per 1M input tokens and $0.7900 per 1M output tokens
• Devstral Medium by Mistral AI — $0.4000 per 1M input tokens and $2.00 per 1M output tokens
• Doubao 1.5 Lite by ByteDance — $0.1000 per 1M input tokens and $0.2000 per 1M output tokens
• Codestral by Mistral AI — $0.3000 per 1M input tokens and $0.9000 per 1M output tokens

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Catalog facts and prices last changed 2026-08-01.