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OpenKey

DeepSeek V4 Flash

DeepSeekReleased Apr 24, 2026

DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and...

Try in playground
Context window
1.0M tokens
Max output
16K tokens
Input
text
Output
text
Tokenizer
DeepSeek
Released
Apr 24, 2026
Reasoning
optional

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.090$0.0027$0.093
Output$0.180$0.0054$0.185
Cache read$0.018$0.0005$0.019

Benchmarks

Artificial Analysis

Intelligence index
40.3
Coding index
56.2
Agentic index
31.1

Design Arena

CategoryEloWin rateRank
3Dmodels126950.1%#24
ASCII artmodels117045.2%#34
Codemodels125650.3%#30
Data vizmodels116841.8%#60
Game devmodels126250.6%#27
SVGmodels121649.5%#23
UI componentsmodels122346.8%#38
Websitesmodels125251%#30

Head-to-head preference voting. How we filter and rank

Supported parameters

  • frequency_penalty
  • include_reasoning
  • logit_bias
  • logprobs
  • max_tokens
  • min_p
  • presence_penalty
  • reasoning
  • repetition_penalty
  • response_format
  • seed
  • stop
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_k
  • top_logprobs
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model deepseek/deepseek-v4-flash.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4-flash",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="deepseek/deepseek-v4-flash",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "deepseek/deepseek-v4-flash",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does DeepSeek V4 Flash cost via API?
Through OpenKey, DeepSeek V4 Flash costs $0.093 per 1M input tokens and $0.185 per 1M output tokens. That is the provider price ($0.090 / $0.180) plus a flat 3% fee — nothing else.
What is DeepSeek V4 Flash's context window?
DeepSeek V4 Flash accepts up to 1.0M tokens of context and returns up to 16K tokens per request.
Is DeepSeek V4 Flash OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "deepseek/deepseek-v4-flash" using any OpenAI SDK — only the base URL and API key change.
What inputs does DeepSeek V4 Flash support?
DeepSeek V4 Flash accepts text input and produces text output.

More from DeepSeek

All DeepSeek models →