OpenAI reached one billion registered users on its platform, a figure equivalent to nearly five times Brazil’s population of 213 million. Earlier this week, the company announced price reductions for its AI models: the ChatGPT-5.6 Luna by 80% and the GPT-5.6 Terra by 20%, while the flagship Sol model’s price remains unchanged. OpenAI told the Wall Street Journal that lower costs make more work viable and that adoption growth brings revenue, feedback, and demand visibility for further investment. The company, led by Sam Altman, aims to attract more users amid competition from Anthropic, whose products are now more highly valued in the market. Corporate clients had recently shied away due to high AI costs. Under the new pricing, sending text messages to Luna dropped from $1 to $0.20 per million tokens, and to Terra from $2.50 to $2; generating replies decreased from $6 and $15 to $1.20 and $12, respectively. Anthropic’s Claude Sonnet 4.6 costs $3 per million tokens for entry and $15 for exit, higher than Terra’s fees. OpenAI attributed the cuts partly to efficiency gains in GPT-5.6. The move follows OpenAI’s consideration of granting the U.S. government a 5% equity stake and comes as it pursues a $250 billion deal with Nvidia for a mega data center in Ohio, a 10-gigawatt project developed