name = "GPT-5.5 Instant" description = "Compact GPT model for low-latency assistance and high-volume workloads" release_date = "2026-05-05" last_updated = "2026-05-28" attachment = true reasoning = true temperature = true tool_call = true structured_output = true knowledge = "2025-12-01" open_weights = false [limit] context = 400_000 input = 400_000 output = 128_000 [modalities] input = ["text", "image", "pdf"] output = ["text"]