72% offDeepSeek V4 Flash 0731 Fast API
DeepSeek·Text
Pricing
Cheapest live price, per 1 million tokens.
Input / 1M tokens
$0.350 OpenRouter
Output / 1M tokens
$0.700 OpenRouter
Cache read / 1M
Repeated prompt prefixes
Cache read is the discounted rate for repeated prompt prefixes (system prompts, agent context).
Capabilities · 9
Specifications
- Context window
- 1M
- Max output
- 33K
- Type
- Text
- Creator
- DeepSeek
- Live sellers
- 18
- Requests / 24h
- 489
Price history · 60 days
Estimated monthly cost
30 days at the cheapest live price.
Quick start
OpenAI-compatible — change the base URL and key. Get a key from the dashboard.
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="YOUR_QUBAX_API_KEY",
)
response = client.chat.completions.create(
model="deepseek-v4-flash-0731-fast",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)About DeepSeek V4 Flash 0731 Fast
DeepSeek V4 Flash 0731 Fast is a 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, grounding responses in real-time web search results, 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. It can write up to 33K tokens in a single response.
As of Oct 28, 2026, DeepSeek V4 Flash 0731 Fast costs $0.099 per 1M input tokens and $0.396 per 1M output tokens on Qubax, versus $0.350 / $0.700 on OpenRouter (72% less on input). A typical 1,000 chat requests (2K tokens in, 500 out) come to about $0.40. 18 independent compute providers currently serve it, so requests fail over automatically. It handled 489 requests on Qubax in the last 24 hours. Pay with USDC, USDT, BTC, ETH or 350+ other coins — no credit card required.
Similar-priced alternatives
Frequently asked questions
How much does the DeepSeek V4 Flash 0731 Fast API cost?
On Qubax, DeepSeek V4 Flash 0731 Fast costs $0.099 per 1M input tokens and $0.396 per 1M output tokens. This is 72% cheaper than OpenRouter's price of $0.350 per 1M input tokens.
Is the DeepSeek V4 Flash 0731 Fast API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use DeepSeek V4 Flash 0731 Fast 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 0731 Fast cheaper on Qubax than OpenRouter?
Qubax sources AI inference from an open compute marketplace on the Base blockchain where GPU providers compete on price. We pass the savings to you — 72% cheaper than OpenRouter's price for DeepSeek V4 Flash 0731 Fast.
How do I pay for DeepSeek V4 Flash 0731 Fast API usage?
Qubax uses prepaid crypto credits. Top up with USDC, USDT, BTC, ETH, SOL or 350+ other coins and your balance is deducted as you use the API. No credit card or KYC required.
What is the context window of DeepSeek V4 Flash 0731 Fast?
DeepSeek V4 Flash 0731 Fast 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 0731 Fast?
You can use DeepSeek V4 Flash 0731 Fast to tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, answer questions with real-time web search, generate structured JSON output for data pipelines and process long documents and entire codebases. 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 and reliable is DeepSeek V4 Flash 0731 Fast on Qubax?
Responses stream token by token. 18 sellers serve it, so if one is slow or down the request moves to the next.
DeepSeek V4 Flash 0731 Fast vs Moondream: Moondream 3.1: which should I choose?
DeepSeek V4 Flash 0731 Fast by DeepSeek and Moondream: Moondream 3.1 by Other are both strong models in a similar price tier. DeepSeek V4 Flash 0731 Fast excels at complex reasoning. Moondream: Moondream 3.1 comes from a different lab and may have different strengths depending on your workload. On Qubax, DeepSeek V4 Flash 0731 Fast starts at $0.099/1M input tokens versus Moondream: Moondream 3.1's $0.135/1M — making DeepSeek V4 Flash 0731 Fast 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 0731 Fast for commercial projects?
Yes. DeepSeek V4 Flash 0731 Fast on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
Why use DeepSeek V4 Flash 0731 Fast on Qubax?
72% cheaper
Providers compete on price — you get the cheapest healthy seller.
Pay with crypto
350+ coins (BTC, ETH, SOL, USDT, USDC). No card, no KYC.
OpenAI & Anthropic compatible
Drop-in base URL. Works with Cline, Cursor, Claude Code, OpenAI and Anthropic SDKs.