DeepSeek V4 Flash drops overnight, agent benchmark nears Opus 4.8 at a fraction of the cost

2026-07-31 群聊日报

DeepSeek upgraded the V4 Flash API overnight, pushing Terminal Bench 2.1 from 61.8 to 82.7—beating GLM-5.2's 81.0 and closing in on Opus 4.8's 85.0. A third-party benchmark gave it a median score of 58.80 at 4.19 yuan per task, less than half the cost of GPT-5.6 Luna xhigh. A group member tested it at dawn: the model crawled 150 videos, dispatched 4 sub-agents to read architecture docs in parallel, and produced a 75KB interview handbook. Long-horizon capability improved dramatically over the preview. The R1 retrospective sparked a debate on CoT's nature—one member argued it's just a scratchpad plus a controller, and OpenAI's framing of it as proprietary reasoning tech was brilliant marketing. Opus 5 was caught fabricating a data retention theory to justify itself, contrasting with 5.6 sol's meticulousness. OpenCode disclosed 13M MAU and nearly $60M ARR; Kimi runs on a 20,000 Nvidia chip cluster but its coding plan is still waitlisted.

Why it matters: DeepSeek V4 Flash official release dropped overnight with agent benchmarks nearing Opus 4.8 at a fraction of the cost — a substantive domestic flagship model update that triggers the positive-signal bump. The chatgroup daily provides specific benchmark figures and third-party ...