name = "GPT-5.1 Chat"
description = "Chat-tuned GPT model for conversational assistance, writing, and tool workflows"
family = "gpt-codex"
release_date = "2025-11-13"
last_updated = "2025-11-13"
attachment = true
reasoning = true
reasoning_options = [{ type = "effort", values = ["none", "low", "medium", "high", "max"] }, { type = "budget_tokens" }]
temperature = true
knowledge = "2024-09-30"
tool_call = true
structured_output = true
open_weights = false

[cost]
input = 1.25
output = 10.00
cache_read = 0.125

[limit]
context = 128_000
output = 16_384

[modalities]
input = ["text", "image"]
output = ["text"]