DeepSeekTextTXT · CHAT · 2026

deepseek-v4-pro

Reasoning and coding for hard, high-stakes tasks.

A reasoning-heavy model tuned for code and math. Strong price-to-performance for unattended, high-stakes work.

Start creating →API reference

Specs

Context window128K tokens

Max output16K tokens

Tool useNative

Avg latency~1.4s first token

Capabilities

ReasoningCodingMathValue

Sample prompt

“Prove this function terminates and write the tests.”

Pricing

$0.55 / $2.20 per 1M tokens · in / out

See pricing →

API

Call it in one request

curl https://api.aperture.network/v1/chat/completions \
  -H "Authorization: Bearer $APERTURE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4-pro","messages":[{"role":"user","content":"Prove this function terminates and write the tests."}]}'