One of the following:
Literal["gpt-6-astra", "gpt-5.6-sol", "gpt-5.6-terra", 100 more]

Model ID used to generate the response, like gpt-6-astra. OpenAI offers a wide range of models with different capabilities, performance characteristics, and price points. Refer to the model guide to browse and compare available models.

One of the following:
"gpt-6-astra"
"gpt-5.6-sol"
"gpt-5.6-terra"
"gpt-5.6-luna"
"gpt-5.5"
"gpt-5.5-2026-04-23"
"gpt-5.4"
"gpt-5.4-mini"
"gpt-5.4-nano"
"gpt-5.4-mini-2026-03-17"
"gpt-5.4-nano-2026-03-17"
"gpt-5.3-chat-latest"
"gpt-5.2"
"gpt-5.2-2025-12-11"
"gpt-5.2-chat-latest"
"gpt-5.2-pro"
"gpt-5.2-pro-2025-12-11"
"gpt-5.1"
"gpt-5.1-2025-11-13"
"gpt-5.1-codex"
"gpt-5.1-mini"
"gpt-5.1-chat-latest"
"gpt-5"
"gpt-5-mini"
"gpt-5-nano"
"gpt-5-2025-08-07"
"gpt-5-mini-2025-08-07"
"gpt-5-nano-2025-08-07"
"gpt-5-chat-latest"
"gpt-4.1"
"gpt-4.1-mini"
"gpt-4.1-nano"
"gpt-4.1-2025-04-14"
"gpt-4.1-mini-2025-04-14"
"gpt-4.1-nano-2025-04-14"
"o4-mini"
"o4-mini-2025-04-16"
"o3"
"o3-2025-04-16"
"o3-mini"
"o3-mini-2025-01-31"
"o1"
"o1-2024-12-17"
"o1-preview"
"o1-preview-2024-09-12"
"o1-mini"
"o1-mini-2024-09-12"
"gpt-4o"
"gpt-4o-2024-11-20"
"gpt-4o-2024-08-06"
"gpt-4o-2024-05-13"
"gpt-4o-audio-preview"
"gpt-4o-audio-preview-2024-10-01"
"gpt-4o-audio-preview-2024-12-17"
"gpt-4o-audio-preview-2025-06-03"
"gpt-4o-mini-audio-preview"
"gpt-4o-mini-audio-preview-2024-12-17"
"gpt-4o-search-preview"
"gpt-4o-mini-search-preview"
"gpt-4o-search-preview-2025-03-11"
"gpt-4o-mini-search-preview-2025-03-11"
"chatgpt-4o-latest"
"codex-mini-latest"
"gpt-4o-mini"
"gpt-4o-mini-2024-07-18"
"gpt-4-turbo"
"gpt-4-turbo-2024-04-09"
"gpt-4-0125-preview"
"gpt-4-turbo-preview"
"gpt-4-1106-preview"
"gpt-4-vision-preview"
"gpt-4"
"gpt-4-0314"
"gpt-4-0613"
"gpt-4-32k"
"gpt-4-32k-0314"
"gpt-4-32k-0613"
"gpt-3.5-turbo"
"gpt-3.5-turbo-16k"
"gpt-3.5-turbo-0301"
"gpt-3.5-turbo-0613"
"gpt-3.5-turbo-1106"
"gpt-3.5-turbo-0125"
"gpt-3.5-turbo-16k-0613"
"o1-pro"
"o1-pro-2025-03-19"
"o3-pro"
"o3-pro-2025-06-10"
"o3-deep-research"
"o3-deep-research-2025-06-26"
"o4-mini-deep-research"
"o4-mini-deep-research-2025-06-26"
"computer-use-preview"
"computer-use-preview-2025-03-11"
"gpt-5.5-pro"
"gpt-5.5-pro-2026-04-23"
"gpt-5-codex"
"gpt-5-pro"
"gpt-5-pro-2025-10-06"
"gpt-5.1-codex-max"
"gpt-daybreak-blue-latest"
"gpt-daybreak-red-latest"
"gpt-5.6-cyber"
str