OpenAIClosed Weights

GPT-5.3-Instant

openai/gpt-5.3-instant

Best Input Price

$1.60 / 1M

Compact GPT model for low-latency assistance and high-volume workloads

Context Window

128,000 tokens

Reasoning

Tool Calling

Supported

Released

2026-03-03

Inference Providers (1)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Poe	openai/gpt-5.3-instant	128,000	$1.60	$13.00	Docs ↗