
DeepSeek is back... and Silicon Valley is terrified
Fireship · 5:32
Fireship covers DeepSeek's new open-source coding harness (plugin-based architecture inspired by their spatio-temporal composability paper) and DeepSeek V4 Pro model. Also discusses OpenAI pausing frontier RL training on 'Astra' for alleged safety reasons, with skepticism about the real motive. Includes a hands-on test building an app with the DeepSeek harness — 2.6M output tokens for $0.30.
Alösha's take: Directly relevant to your daily driver — compares DeepSeek's harness architecture against Claude Code, and the Anthropic source-map leak callback is spicy context.










