BytePlus: DeepSeek V4 Flash
byteplus/deepseek-v4-flash-260425
Try DeepSeek V4 Flash for free in your browser, and add it to your app for free with Puter.js AI API.
Try it free Add to your app// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "byteplus/deepseek-v4-flash-260425"
}).then(response => {
document.body.innerHTML = response.message.content;
});
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.ai.chat("Explain quantum computing in simple terms", {
model: "byteplus/deepseek-v4-flash-260425"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
DeepSeek V4 Flash is a Mixture-of-Experts model from DeepSeek, made available here through BytePlus's ModelArk platform. It has 284 billion total parameters with 13 billion activated per token, and supports a 1 million token context window with three reasoning modes (non-think, think high, and think max).
In think-max mode, DeepSeek reports 91.6 on LiveCodeBench, 88.1 on GPQA Diamond, and 86.2 on MMLU-Pro, close to the larger V4 Pro's scores on the same benchmarks. Flash reaches most of Pro's reasoning quality at a fraction of the active parameter count.
The model is built as the fast, lower-cost member of the V4 family, aimed at coding assistants, chat systems, and agent workflows where response speed and per-token cost matter as much as raw accuracy. Tool calling is supported, so it works in the same agentic pipelines used with DeepSeek's larger models.
Context Window 1M
tokens
Max Output 384K
tokens
Input Cost $0.14
per million tokens
Output Cost $0.28
per million tokens
Input text
modalities
Tool Use Yes
Release Date Apr 25, 2026
Try DeepSeek V4 Flash for free
Try DeepSeek V4 Flash instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
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Frequently Asked Questions
You can access DeepSeek V4 Flash by BytePlus through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
DeepSeek V4 Flash is free to try with a Puter account. Every account includes a free AI allowance, and you can chat with it in the playground on this page. You can upgrade your account anytime for a larger allowance.
DeepSeek V4 Flash is free to integrate using the Puter.js AI API. With the User-Pays Model, you can add AI to your app for $0, since users cover their own AI usage through their Puter account.
| Price per 1M tokens | |
|---|---|
| Input | $0.14 |
| Output | $0.28 |
DeepSeek V4 Flash was created by BytePlus and released on Apr 25, 2026.
DeepSeek V4 Flash supports a context window of 1M tokens. For reference, that is roughly equivalent to 2,048 pages of text.
DeepSeek V4 Flash can generate up to 384K tokens in a single response.
DeepSeek V4 Flash accepts the following input types: text. It produces: text.
Yes, DeepSeek V4 Flash supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.
Yes — the DeepSeek V4 Flash API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.
Add DeepSeek V4 Flash to your app for free
Developers can integrate DeepSeek V4 Flash for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.