DeepSeek V4.1 Flash API: pricing, base URL and quick setup

Specifications and pricing

USD per 1M tokens. Reference rates appear until current prices load. Final billing depends on your API key group and metered usage.

Quick setup

curl https://a2agent.me/v1/chat/completions \
  -H "content-type: application/json" \
  -H "authorization: Bearer sk-your-a2agent-key" \
  -d '{
    "model": "deepseek-v4.1-flash",
    "messages": [{"role": "user", "content": "Reply with OK"}]
  }'

Using it from a coding client

Use deepseek-v4.1-flash as the model ID in your client. Follow its connection guide and check a short request before testing tool calls or long conversations.

• Run it in Cline
• Run it in Roo Code

How it compares within its family

These comparisons use catalog context limits, tags and reference rates, not independent quality benchmarks. Rates can change. Check current pricing above and test your workload; a higher price or a larger context window does not establish better results.

DeepSeek V4.1 Flash is listed separately from V4 Flash and V4 Pro in the A2Agent catalog. Select deepseek-v4.1-flash explicitly when configuring a client; the V4 Flash ID selects a different entry. The rates and discount shown above come from the live catalog, so compare those figures when choosing between the entries. Input and output are priced separately, so include both when estimating the cost of a conversation. A dash in a price field means that a rate is unavailable. Its context limit has not been recorded here either, so the 1M limit listed for V4 Flash and V4 Pro should not be assumed to apply. For a migration, check your prompt sizes and required features, then compare outputs on the same tasks before changing the model used by an existing application.

Other models on this platform

• DeepSeek V4 Pro1M
• DeepSeek V4 Flash1M

Questions