DeepSeek V4 Pro Just Dropped — Here's What Changed for AI Agents

V4 Pro launched April 24, 2026. Been running it on production agents since.

Specs

• Total params: 1.6T (MoE)
• Active params: 49B
• Context: 1M tokens (verified)
• Modes: Think / Non-Think dual
• License: MIT
• Pricing: $1.74/1M input, $3.48/1M output

API Setup (OpenAI-compatible)

client = OpenAI(
    base_url="https://integrate.api.nvidia.com/v1",
    api_key="<NVIDIA_NIM_KEY>"
)
response = client.chat.completions.create(
    model="deepseek-ai/deepseek-v4-pro",
    messages=[...]
)

Real-World Performance

• Long context tasks: Finally viable at scale (full conversation logs)
• Thinking mode: 8-15s, much better multi-step planning vs V3
• Non-thinking mode: ~2s, fast enough for content pipelines
• Function calling: More reliable than V3.2

Cost Comparison (per 1M tokens)

For agent workloads (lots of input, structured output), V4 Pro is the new sweet spot.

My agent automation guides updated for V4: https://yanmiayn.gumroad.com