OpenAIClosed Weights

GPT-5-Codex

openai/gpt-5-codex

Best Input Price

$1.10 / 1M

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

Context Window

400,000 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2025-09-23

Inference Providers (5)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Poe	openai/gpt-5-codex	400,000	$1.10	$9.00	Docs ↗
Abacus	gpt-5-codex	400,000	$1.25	$10.00	Docs ↗
ZenMux	openai/gpt-5-codex	400,000	$1.25	$10.00	Docs ↗
Impossibl	openai/gpt-5-codex	400,000	$1.25	$10.00	Docs ↗
Vercel AI Gateway	openai/gpt-5-codex	400,000	$1.25	$10.00	Docs ↗