DeepSeek built a Claude Code rival, then quadrupled its prices

DeepSeek has launched DeepSeek Harness v0.1, an open-source agent harness designed as a rival to Anthropic's Claude Code. Simultaneously, the company released DeepSeek-V4-Pro, a flagship model optimized for agentic workloads available via web, mobile, and API. However, DeepSeek significantly increased its API pricing; DeepSeek-V4-Pro peak rates rose from $0.87 to $3.96 per million output tokens, while V4-Flash increased from $0.28 to $1.32. These strategic moves represent a broader push into developer software and AI agent environments.