base_model = "openai/gpt-5.4" reasoning_options = [] [cost] input = 5 output = 22.5 cache_read = 0.25 [[cost.tiers]] tier = { type = "context", size = 272_000 } input = 5 output = 22.5 cache_read = 0.5 [experimental.modes.fast] cost = { input = 5, output = 30, cache_read = 0.5 } provider = { body = { service_tier = "priority" } }