DeepSeek V4 Flash

Input price: per 1M tokens
Output price: per 1M tokens
Context: 1.05M131.1K max output
Cost / request: 8K in · 500 out
Writing Elo: 1556EQ-Bench creative writing

01Routes and pricingLoading

02Capabilities

Input: text
Output: text
Context: 1.05M
Max output: 131.1K

ReasoningTool callingStructured outputJSON modeSeeded sampling

03BenchmarksMethodology →

Creative writing

1555.7 EloEQ-Bench Creative Writing v3EQ-Bench Creative Writing v3

04Quick start

Call it with your RProuter key

Any OpenAI-compatible SDK works. Point it at the RProuter base URL from your API keys page and use this model ID.

Quick start guide Create an API key

Catalog source: openrouter.ai · checked 2026-09-16

const response = await client.chat.completions.create({
  model: "deepseek/deepseek-v4-flash",
  messages: [{ role: "user", content: "A story begins…" }],
  max_tokens: 500,
  stream: true,
});

for await (const chunk of response) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}