Opus 4.6 Fast Mode available on AI Gateway (opens in new tab)

# Opus 4\.6 Fast Mode available on AI Gateway **Published:** April 7, 2026 | **Authors:** Walter Korman, Rohan Taneja, Jeremy Philemon, Jerilyn Zheng --- Fast mode support for Claude Opus 4.6 is now available on AI Gateway. Fast mode is a premium high-speed option that delivers 2.5x faster output token speeds with the same model intelligence. This is an early, experimental feature. Fast mode's increased output token speeds enable new use cases, especially for human-in-the-loop workflows....