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CheapestInference

DeepSeek V4 Flash API — unlimited & flat-rate access

DeepSeek V4 Flash is DeepSeek’s fast model with a 1M-token context window. CheapestInference serves it in the Core Pool through an OpenAI- and Anthropic-compatible API on unlimited, flat-rate time-block subscriptions — so your cost does not scale with tokens.

Quick facts

Section titled “Quick facts”
ModelDeepSeek V4 Flash
VersionV4-Flash-0731 — agent-focused retrain, live since 2026-07-31 (what changed)
Model IDdeepseek-v4-flash
Context window1M tokens
Per-token price elsewhere$0.14 in / $0.28 out per 1M — reference only
PoolCore Pool (with MiMo v2.5)
Endpoints/v1/chat/completions (OpenAI), /anthropic/v1/messages (Anthropic)
Pricing$14.99/mo per 8-hour daily time block ($12.74/mo with annual billing), up to full 24/7

Call DeepSeek V4 Flash

Section titled “Call DeepSeek V4 Flash”
from openai import OpenAI


client = OpenAI(
    base_url="https://api.cheapestinference.com/v1",
    api_key="sk-..."  # your subscriber key
)


response = client.chat.completions.create(
    model="deepseek-v4-flash",
    messages=[{"role": "user", "content": "Summarize this document..."}],
)
Terminal window
curl https://api.cheapestinference.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "deepseek-v4-flash", "messages": [{"role": "user", "content": "Hello"}]}'

Why flat-rate DeepSeek V4 Flash

Section titled “Why flat-rate DeepSeek V4 Flash”

DeepSeek V4 Flash combines high speed with a 1M-token context window, making it well suited to high-volume pipelines, large-document processing, and long agent conversations. On CheapestInference it is billed at a flat monthly rate, not per token, so bulk workloads have a fixed, predictable cost — a Core Pool time block covers unlimited DeepSeek V4 Flash usage (plus MiMo v2.5) during your reserved hours. It works in any OpenAI-compatible client.

Common questions

Section titled “Common questions”

Is there a cheap unlimited DeepSeek API? Yes. A CheapestInference Core Pool subscription gives unlimited DeepSeek V4 Flash usage — no token counting, no overage charges during your reserved daily 8-hour blocks — for a flat $14.99/month per block ($12.74/mo with annual billing). It is an OpenAI- and Anthropic-compatible drop-in: point your SDK at https://api.cheapestinference.com/v1 and use model id deepseek-v4-flash.

How much does DeepSeek V4 Flash cost? From $14.99/month ($12.74/mo with annual billing). You reserve one or more 8-hour daily time blocks (up to full 24/7) and use DeepSeek V4 Flash with no token caps — billed at a flat monthly fee, not per token.

What is the DeepSeek V4 Flash context window? 1M tokens, so it handles large codebases, long documents, and extended agent conversations in a single request.

How does DeepSeek V4 Flash compare to Claude Opus or GPT-5.6? On raw capability Claude Opus leads: DeepSeek’s own head-to-head has Claude Opus 4.8 ahead on all seven shared agent benchmarks — though by as little as 0.5 points (Agents’ Last Exam) at roughly 1/90th of the reference output price. Against its price peers the picture flips: Artificial Analysis measures the 0731 build at 50 on its Intelligence Index — one point behind GPT-5.6 Luna with ~60% lower cost per task, tied with Gemini 3.6 Flash — and places it on the intelligence-vs-cost Pareto frontier. Full comparison with charts.

Is DeepSeek V4 Flash OpenAI-compatible? Yes. Use model id deepseek-v4-flash against https://api.cheapestinference.com/v1 with the OpenAI SDK, or the /anthropic endpoint with the Anthropic SDK.

Section titled “Related”