DeepSeek V4 Flash API
DeepSeek
DeepSeek V4 Flash — efficiency-optimized 284B-parameter MoE model with 13B active parameters, 1M context, and strong reasoning/coding performance.
About DeepSeek V4 Flash
DeepSeek V4 Flash is a large language model developed by DeepSeek. It's particularly well-suited for tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, producing structured outputs for reliable data extraction, and handling large contexts of up to 1M tokens. Its 1M-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. Developers choose DeepSeek V4 Flash when they need reliable, production-quality AI inference through a simple API — and on Qubax, it's available at a fraction of the cost of traditional providers.
In the broader AI landscape, DeepSeek V4 Flash sits among the frontier-tier offerings from DeepSeek With advanced reasoning and agentic tool use, it competes with the most frontier-tier models on the market. What sets it apart on Qubax isn't just the model itself — it's the accessibility. Rather than dealing with enterprise contracts or traditional payment rails, you get instant access via an OpenAI-compatible endpoint. That means you can drop DeepSeek V4 Flash into Cursor, Cline, LangChain, or any framework that speaks the OpenAI protocol and start building immediately.
Qubax offers DeepSeek V4 Flash at 88% below OpenRouter's price — just $0.011 per million input tokens and $0.021 per million output tokens. That pricing advantage compounds quickly at scale: a high-volume application sending millions of tokens per day can save significantly compared to using OpenRouter or the provider directly. And because Qubax runs on crypto-native infrastructure, you can pay with USDC, USDT, ETH, BTC, or 200+ other cryptocurrencies — no credit card or bank account required. New users even get $1 in free credits to test DeepSeek V4 Flash risk-free before committing.
Pricing
| Token Type | Qubax | OpenRouter | You Save |
|---|---|---|---|
| Input (per 1M tokens) | $0.011 | $0.088 | 88% |
| Output (per 1M tokens) | $0.021 | $0.176 | 88% |
Prices per 1 million tokens. Pay with 200+ cryptocurrencies.
Estimated Monthly Cost
Specifications
Use Cases
Capabilities
Quick Start
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="qbx_live_YOUR_API_KEY",
)
response = client.chat.completions.create(
model="deepseek-v4-flash",
messages=[
{"role": "user", "content": "Hello!"}
],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.qubax.ai/v1",
apiKey: "qbx_live_YOUR_API_KEY",
});
const response = await client.chat.completions.create({
model: "deepseek-v4-flash",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);curl https://api.qubax.ai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer qbx_live_YOUR_API_KEY" \
-d '{
"model": "deepseek-v4-flash",
"messages": [{"role": "user", "content": "Hello!"}]
}'Get your API key from the dashboard. New users get $1 free credits.
Why use DeepSeek V4 Flash on Qubax?
88% Cheaper
Up to 88% off OpenRouter prices
Pay with Crypto
200+ coins (BTC, ETH, SOL, USDT, USDC & more). No credit card needed.
OpenAI Compatible
Drop-in replacement. Works with Cline, Cursor, any tool.
More from DeepSeek
Compare DeepSeek V4 Flash with alternatives
| Model | Provider | Input / 1M | Output / 1M | vs DeepSeek V4 Flash |
|---|---|---|---|---|
| DeepSeek V4 Flash | DeepSeek | $0.011 | $0.021 | — |
| OpenAI GPT OSS 120B | OpenAI | $0.014 | $0.055 | More expensive |
| Llama 3.3 70B | Meta | $0.013 | $0.042 | More expensive |
| Qwen 3 235B A22B Instruct 2507 (Morpheus Web) | Alibaba | $0.019 | $0.098 | More expensive |
| OpenAI GPT OSS 120B (Morpheus Web) | OpenAI | $0.014 | $0.059 | More expensive |
Frequently Asked Questions
How much does the DeepSeek V4 Flash API cost?
On Qubax, DeepSeek V4 Flash costs $0.011 per 1M input tokens and $0.021 per 1M output tokens. This is 88% cheaper than OpenRouter's price of $0.088 per 1M input tokens.
Is the DeepSeek V4 Flash API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use DeepSeek V4 Flash as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
Why is DeepSeek V4 Flash cheaper on Qubax than OpenRouter?
Qubax sources AI inference from the Surplus Intelligence marketplace, an open marketplace on the Base blockchain where compute providers compete on price. We pass the savings to you — 88% cheaper than OpenRouter's price for DeepSeek V4 Flash.
How do I pay for DeepSeek V4 Flash API usage?
Qubax uses prepaid crypto credits. Deposit USDC on the Base chain and your balance is automatically deducted as you use the API. New users get $1 in free credits to start. No credit card required.
What is the context window of DeepSeek V4 Flash?
DeepSeek V4 Flash supports a context window of 1M tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with DeepSeek V4 Flash?
DeepSeek V4 Flash is versatile enough for a wide range of applications. You can use it to tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, generate structured JSON output for data pipelines, process long documents and entire codebases, and more. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast is DeepSeek V4 Flash on Qubax?
DeepSeek V4 Flash on Qubax supports streaming responses, so tokens begin arriving in real time as they're generated. Latency depends on the provider and prompt complexity, but most requests start streaming within 200–800 milliseconds. Qubax routes requests through the Surplus Intelligence marketplace, which selects the fastest available compute provider for each request — so you get competitive latency at a lower price.
DeepSeek V4 Flash vs OpenAI GPT OSS 120B: which should I choose?
DeepSeek V4 Flash by DeepSeek and OpenAI GPT OSS 120B by OpenAI are both strong models in a similar price tier. DeepSeek V4 Flash excels at complex reasoning. OpenAI GPT OSS 120B comes from a different lab and may have different strengths depending on your workload. On Qubax, DeepSeek V4 Flash starts at $0.011/1M input tokens versus OpenAI GPT OSS 120B's $0.014/1M — making DeepSeek V4 Flash the more cost-effective option for high-volume workloads. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use DeepSeek V4 Flash for commercial projects?
Yes. DeepSeek V4 Flash on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
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