OpenAI reduced pricing on two new GPT-5.6 models: Terra (mid-tier) by 20% to $2/12 per 1M tokens, and Luna (small) by 80% to $0.2/1.2 per 1M tokens, citing strategy to improve model capabilities at lower cost. Analysts attribute the cuts partly to competition from high-performing Chinese AI models like Kimi K3 that undercut on price. Relevant for Thai tech companies evaluating AI API costs and market dynamics.