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DeepSeek V4-Flash beta targets Responses API and Codex compatibility
DeepSeek says the public-beta API supports the Responses API format and is adapted for Codex; compatibility and benchmark claims still need workload-level verification.
Overview
DeepSeek announced a public beta for V4-Flash with native support for the Responses API format and adaptation for Codex. The company also claims improved agent-benchmark performance, which was not independently reproduced in the supplied evidence.
Why it matters
Compatibility with established agent API and harness surfaces could lower the cost of testing an alternative model.
Actual interoperability, reliability, and performance remain unverified beyond the vendor announcement.
Key facts
DeepSeek describes V4-Flash as a public-beta API.
The vendor says the API supports the Responses API format and is adapted for Codex.
Latest update
No public update is available.
Full timeline
No public timeline entries are available.
Sources
Open questions
- How complete is Responses API compatibility across tools, streaming, errors, and state?
- Do the claimed benchmark improvements hold on real agent workloads?
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Roundup appearances
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