OpenAI slashes API costs amid rising global competition

OpenAI cut GPT-5.6 Luna API prices by 80% and GPT-5.6 Terra by 20%, while keeping GPT-5.6 Sol unchanged.

The company said the reductions were driven by inference and infrastructure gains, including more efficient GPU kernels, speculative decoding, and better prompt caching.

Coming just three weeks after launch, the move highlights OpenAI’s push to improve price-to-intelligence amid intensifying global competition.

The lower pricing should help developers running high-volume agent workloads, where model-call costs add up quickly.