DeepSeek V4.1 Flash Fast available on Baseten

DeepSeek V4.1 Flash Fast is now available through Baseten Model APIs. It serves the same 552B-parameter multimodal model as DeepSeek V4.1 Flash at full precision, on dedicated Fast capacity for higher sustained throughput, and is purpose-built for long-running agentic coding sessions. It has a 1M-token context window, vision, tool calling, and reasoning on by default.
Send requests to deepseek-ai/DeepSeek-V4.1-Flash-Fast through our OpenAI-compatible endpoint with your Baseten API key:

curl https://inference.baseten.co/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $BASETEN_API_KEY" \
  -d '{
    "model": "deepseek-ai/DeepSeek-V4.1-Flash-Fast",
    "messages": [
      {"role": "user", "content": "Read the failing test, find the bug, and send me the patch."}
    ],
    "reasoning_effort": "high"
  }'

For more information, see our docs.