GptClosed Weights

GPT-5.1 Codex Max

gpt-5.1-codex-max

Best Input Price

$1.25 / 1M

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

Context Window

400,000 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2025-11-13

Inference Providers (1)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Abacus	gpt-5.1-codex-max	400,000	$1.25	$10.00	Docs ↗