DeepSeek V4 Flash API goes public, agent benchmarks far ahead of V4 Pro preview

DeepSeek-V4-Flash 正式版 API 上线公测，Agent 能力基准测试远超 V4-Pro 预览版

DeepSeek released the V4 Flash production API for public testing today. Only post-training changed; model architecture and size stayed the same. Agent scores jumped—Terminal Bench 2.1 hit 82.7, DeepSWE 54.4, which the team says far exceeds the V4 Pro preview. Flash now natively supports the Responses API format and is tuned for Codex. The V4 Pro production version is still “coming soon.” Only the API endpoint was upgraded; the app and web versions remain unchanged.

Why it matters: DeepSeek V4 Flash official version hits public testing with Agent scores beating V4 Pro preview — a substantive domestic flagship model update. Two hard numbers (Terminal Bench 2.1, DeepSWE) give real signal. Score held back because it's Flash not Pro, and the post doesn't det...