OpenAIClosed Weights

GPT-5.3-Codex-Spark

openai/gpt-5.3-codex-spark

Best Input Price

$0.00 / 1M

Coding-optimized GPT model for repository edits, reviews, and agentic software work

Context Window

128,000 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2026-03-04

Inference Providers (1)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Poe	openai/gpt-5.3-codex-spark	128,000	$0.00	$0.00	Docs ↗