OpenAI disclosed that its models now reach more than one billion active users and more than two million businesses, an announcement that followed price reductions on two models in its GPT-5.6 family.
The company cut the price of GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20%, citing efficiency gains from internal model development
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OpenAI disclosed that its models now reach more than one billion active users and more than two million businesses, an announcement that followed price reductions on two models in its GPT-5.6 family.
The company cut the price of GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20%. Luna is now priced at $0.20 per million input tokens and $1.20 per million output tokens, down from $1 and $6. Terra's rates fell to $2 per million input tokens and $12 per million output tokens, from $2.50 and $15. Pricing for Sol, the most capable model in the family, remains unchanged, the company said.
OpenAI attributed the reductions to efficiency improvements made during internal development of GPT-5.6, including the model's role in optimizing production software and improving speculative decoding. Those efforts reduced end-to-end serving costs by 20% and increased token-generation efficiency by more than 15%, the company said. The company also said improvements to context management raised GPT-5.6 Sol's score on the ARC-AGI-3 benchmark from 13.3% to 38.3% while using six times fewer output tokens.
"When the cost of useful intelligence falls, more work becomes worth doing," the company said.
The pricing changes come at a moment when enterprise customers have grown wary of high AI spending, according to The Wall Street Journal. OpenAI CEO Sam Altman acknowledged earlier this year that pricing had emerged as a growing problem for customers, the Journal reported.
The Journal had previously reported that OpenAI spent several weeks deliberating over reductions as its leadership grew increasingly concerned about Anthropic making its Claude models cheaper.
Enterprise customers have grown reluctant to authorize large AI expenditures without a clear picture of returns, and cheaper Chinese open-weight models have intensified the competitive environment. Anthropic's mid-tier Claude Sonnet 4.6 carries a price of $3 per million input tokens and $15 per million output tokens, putting it above Terra's new rates.
OpenAI also said that six months after signing up, users send roughly 50% more messages per day and use ChatGPT for about twice as many types of tasks. Agentic work through Codex now accounts for 99.8% of weekly output tokens across the company, OpenAI said.
The company is operating at a loss as it continues to spend on model development and infrastructure. OpenAI's financials showed revenue of $13.07 billion in 2025 against a net loss of $38.5 billion.
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