OpenAI cuts GPT-5.6 Sol prices for developers by over 20% amid AI rivalry

OpenAI is cutting GPT-5.6 Sol API prices by more than 20% for three months as competition from Anthropic and Chinese AI models intensifies. The lower rates apply to eligible developer plans, ChatGPT Work credits and Codex, while Pro, Plus and Business subscriptions remain unchanged. Input pricing falls to $4 per million tokens, while output drops to $20.