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reasoningDeepSeek

DeepSeek V4 Flash

Fast open reasoning model with transparent chain-of-thought. Strong at math, logic and multi-step problem solving, with low latency suitable for production and automation.

deepseek-ai/deepseek-v4-flash
Retired· verified 44 min agoThis model has been retired by its provider and is no longer served.

What is DeepSeek V4 Flash?

DeepSeek V4 Flash is DeepSeek's reasoning model. Fast open reasoning model with transparent chain-of-thought. Strong at math, logic and multi-step problem solving, with low latency suitable for production and automation. It runs on Speka's OpenAI-compatible /v1/chat/completions endpoint at $0.27 / 1M input and $1.10 / 1M output tokens, using the model ID deepseek-ai/deepseek-v4-flash.

Test it live

Live playgroundDeepSeek V4 Flashin-browser demo

Test DeepSeek V4 Flash live

Send a message and watch the model respond. Multi-turn — it remembers the conversation.

How to call DeepSeek V4 Flash via the API

Speka exposes DeepSeek V4 Flash on an OpenAI-compatible /v1/chat/completions endpoint. Point any OpenAI SDK at https://speka.me/v1, set model to deepseek-ai/deepseek-v4-flash, and your existing code runs unchanged.

quickstart.py
from openai import OpenAI

client = OpenAI(
    base_url="https://speka.me/v1",
    api_key="sk-speka-live-...",  # your Speka key
)

resp = client.chat.completions.create(
    model="deepseek-ai/deepseek-v4-flash",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)
FAQ

Frequently asked questions

DeepSeek V4 Flash is DeepSeek's reasoning model. Fast open reasoning model with transparent chain-of-thought. Strong at math, logic and multi-step problem solving, with low latency suitable for production and automation. It is available on Speka's OpenAI-compatible API using the model ID deepseek-ai/deepseek-v4-flash.
On Speka, DeepSeek V4 Flash is priced at $0.27 / 1M input and $1.10 / 1M output tokens. Pricing is per-token with no subscription or seat fee — usage is billed against your plan's monthly allowance, then at the same rate with no overage penalty. Rates are current as of June 2026; check the pricing page for updates.
Speka exposes DeepSeek V4 Flash on an OpenAI-compatible /v1/chat/completions endpoint. Set base_url to https://speka.me/v1, supply your Speka key, and set model to "deepseek-ai/deepseek-v4-flash" in any OpenAI SDK — no other code changes are required.
DeepSeek V4 Flash supports a 128,000-token context window — roughly 96,000 words of input, suitable for long documents, multi-turn agents, and large-context tasks.
Yes. DeepSeek V4 Flash is served through Speka's OpenAI-compatible endpoint, so any application built on the OpenAI Python or Node.js SDK, LangChain, or LlamaIndex can call it by changing only the base URL and model ID.

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