The builder’s guide to GPT‑5.6

GPT-5.6 Luna sets a new standard for price-performance, delivering comparable results to GPT-5.5 (Extra High) at a significantly reduced cost. On the BrowseComp benchmark, GPT-5.6 Luna (Extra High) scored 84.04% for $1.33, while GPT-5.5 (Extra High) previously scored 84.36% for $33.27. This represents a substantial price reduction for similar performance, with further price cuts having been implemented since launch.