DeepSeek is running a short V4.1 Flash intermediate API beta. Keep the same base_url and set model to deepseek-v4.1-flash-expires-on-0910. DeepSeek describes a new architecture with native multimodality that is faster and cheaper; billing matches deepseek-v4-flash, about 20 concurrent requests per account, with the test window roughly through Sep 10 (expires-on-0910 in the model id).

Key Takeaways

  • ✓Call with model id deepseek-v4.1-flash-expires-on-0910; base_url unchanged.
  • ✓Same pricing as deepseek-v4-flash, ~20 concurrent per account; short window ~through Sep 10.
  • ✓Positioned as a new-architecture, native-multimodal, faster/cheaper mid-build.
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