DeepSeek raised prices fourfold on its V4 models according to Engadget, while OpenAI cut GPT-5.6 Luna input and output token prices and Anthropic launched Opus 5 at half the cost of its prior Fable 5 model and canceled a planned Sonnet 5 increase per Ars Technica. DeepSeek's V4-Pro received mixed reviews. These moves occur against a backdrop of differing market and regulatory conditions for Chinese and U.S. AI providers.