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DeepSeek V4 Flash (Free)

nvidia/deepseek-v4-flash

nvidia

DeepSeek V4 Flash hosted free by NVIDIA. 1M context. Currently capacity-constrained — requests may be answered by an equivalent free model.

Code Examples

from blockrun_llm import LLMClient

client = LLMClient()  # Uses BLOCKRUN_WALLET_KEY (never sent to server)
response = client.chat("nvidia/deepseek-v4-flash", "Hello!")

Pricing

InputFree / 1M tokens
OutputFree / 1M tokens
Context1M tokens
Max Output16K tokens

Free model — no payment or wallet required.

Payment

Network
Base
Currency
USDC
Protocol
x402

Pay per request with USDC on Base. No subscription required.

Try It

Send a message to try DeepSeek V4 Flash (Free)

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About NVIDIA DeepSeek V4 Flash (Free)

DeepSeek V4 Flash hosted free by NVIDIA. 1M context. Currently capacity-constrained — requests may be answered by an equivalent free model. It is built by NVIDIA and served through BlockRun's OpenAI-compatible API, which means you can call it without an account, an API key, or a subscription. Requests are paid for individually, in USDC, at the moment they are made.

What it costs

DeepSeek V4 Flash (Free) is free to call on BlockRun. No payment header is required, no wallet needs funding, and no API key is issued — requests are rate limited per IP rather than billed. It is a practical way to develop against the API surface before moving production traffic onto a paid model.

Specifications

Context window
1,000,000 tokens
Maximum output
16,384 tokens
API compatibility
OpenAI-compatible
Payment
Free — no payment required
Categories
chat, reasoning, coding

Calling it from your code

Pass nvidia/deepseek-v4-flash as the model field. Because the endpoint mirrors the OpenAI chat completions schema, any existing OpenAI client works by changing the base URL — streaming, tool use, and multi-turn messages all behave the same way.

The first request comes back as an HTTP 402 carrying a signed price quote. Your client signs that quote with a wallet holding USDC and retries; the second request returns the completion, and the payment settles on-chain. Client libraries handle this handshake for you, so in practice it is a single call. See the documentation for request and response shapes, or browse the full catalog of 71 chat models to compare alternatives.

Related models

Every model on BlockRun is reached through the same endpoint and the same payment flow, so switching is a one-line change to the model field. These are the closest alternatives to DeepSeek V4 Flash (Free):