DeepSeek V4 Flash 0731

• GPQA DiamondVery hard multiple-choice questions in biology, physics and chemistry, written by PhD experts. Random guessing scores 25%.91.0%#21 of 116
• AIME mathCompetition-level math problems in the style of the American Invitational Mathematics Examination. Share solved.94.4%#29 of 112
• FrontierMathOriginal, unpublished math problems written by professional mathematicians, from advanced to research level. Share solved.57.5%#33 of 73
• SimpleQA VerifiedShort factual questions. Measures how often the model gets facts right instead of making something up.33.6%#49 of 69

Benchmark data: Epoch AI, licensed CC BY 4.0

Companies that serve this model through an API: 30. Prices per million tokens, cheapest first.

Availability and prices come from OpenRouter’s public API and are refreshed daily. Uptime is the share of successful requests over the last 24 hours. Some providers run a compressed version of open models (fp8, int4), which is cheaper but can be slightly less accurate.

Call DeepSeek V4 Flash 0731 through OpenRouter’s OpenAI-compatible API: create a key on openrouter.ai, then run one of these examples.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "deepseek/deepseek-v4-flash-0731", "messages": [{"role": "user", "content": "Hello! What can you do?"}]}'

import os
from openai import OpenAI

client = OpenAI(base_url="https://openrouter.ai/api/v1", api_key=os.environ["OPENROUTER_API_KEY"])
reply = client.chat.completions.create(
    model="deepseek/deepseek-v4-flash-0731",
    messages=[{"role": "user", "content": "Hello! What can you do?"}],
)
print(reply.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({ baseURL: "https://openrouter.ai/api/v1", apiKey: process.env.OPENROUTER_API_KEY });
const reply = await client.chat.completions.create({
  model: "deepseek/deepseek-v4-flash-0731",
  messages: [{ role: "user", content: "Hello! What can you do?" }],
});
console.log(reply.choices[0].message.content);

The same code works with every model on this site: only the model ID changes. Many labs also offer their own API and SDK.

• 1,000 chat replies

  ≈ 500 tokens in, 300 out each
  $0.105
• Summarise a 100-page document

  ≈ 50,000 tokens in, 1,000 out
  $0.0012
• An app with 10,000 requests a day for a month

  ≈ 1,000 tokens in, 400 out each
  $43.80

Cost calculator →

• elDiario.esSep 28, 2026es

  Investigadores españoles demuestran que ChatGPT, Gemini, Claude y otras IA filtran datos de los chats a anunciantes

• ActuIASep 25, 2026fr

  Résumés AI Act : 21 documents sur 24 ne nomment aucun site moissonné dans la rubrique prévue

• WWWhat’s newSep 24, 2026es

  DeepSeek publica cómo gestiona 380.000 entornos aislados simultáneos para entrenar agentes de IA

• XatakaSep 24, 2026es

  Decenas coinciden: "escrita con IA". Un escritor francés está ganando premios con su nueva novela menos el de la sinceridad

• ClubicSep 24, 2026Translated from French

  Deep Seeik: Chinese AI targets $1 billion in annual revenue

How much does DeepSeek V4 Flash 0731 cost?

DeepSeek V4 Flash 0731 costs $0.018 per million input tokens and $0.32 per million output tokens through the API. For example, 1,000 chat replies of about 500 tokens in and 300 out cost around $0.105.

What is the context window of DeepSeek V4 Flash 0731?

DeepSeek V4 Flash 0731 can read up to 1,048,576 tokens in one request, about 1,966 pages of text. It can write up to 943,718 tokens in a single answer.

Is DeepSeek V4 Flash 0731 open source?

Yes. Its weights are published (deepseek-ai/DeepSeek-V4-Flash-0731), so you can download it and run it on your own hardware, or use it through one of 30 API providers.

Who makes DeepSeek V4 Flash 0731?

DeepSeek V4 Flash 0731 is made by DeepSeek. It became available through the API on July 31, 2026.

How good is DeepSeek V4 Flash 0731?

DeepSeek V4 Flash 0731 has an overall index of 154.5 in Epoch AI’s independent tests, ranking #30 of 136 models we track.

Can DeepSeek V4 Flash 0731 read images?

No. DeepSeek V4 Flash 0731 only accepts text as input.

What are the alternatives to DeepSeek V4 Flash 0731?

Models with a similar price from other companies include Ling 3.0 Flash VL, gpt-oss-20b and Nex-N2.5-Mini. You can compare them side by side on this page.