GPT-5.3 series

gpt-5.3-codex

Capabilities

Show unsupported (7)

Infrastructure

Streaming

Details

Model IDgpt-5.3

ProviderAzure AI Foundry

CreatorOpenAI

License—

Status—

Typechat

Input modalitiestext

Output modalitiestext

Open weight—

Parameters—

Architecture—

Context window—

Max input—

Max output—

Reasoning tokens—

Knowledge cutoff—

Release date—

Sourceofficial

Family Comparison: gpt-5.3

Model	Caps	Perf	Speed	Context	Max out
gpt-5.3-chat	TJJMS	—	—	128K	16K
gpt-5.3-codex	RTJJMS	—	—	400K	128K
GPT-5.3 series	S	—	—	—	—

API

GET/v1/models/azure/gpt-5.3