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Story summary
- OpenAI reduced the price of GPT-5.6 Luna by 80 % and GPT-5.6 Terra by 20 % on July 30, 2026, citing efficiency gains in GPT-5.6.
- Luna costs $0.20 per million input and $1.20 per million output while Terra costs $2 per million input and $12 per million output.
- Analysts say the lower prices could increase usage but may strain finances and heighten competition with Anthropic and Chinese rivals.
