A.X Models by SK Telecom

SK TelecomApache 2.0Open source

2 models2025–2026Up to 262k ctx

Last refreshed 2026-09-04. Next refresh: weekly.

LicenseApache 2.0OSI-approved

Commercial useCommercial use: permitted

Models2

Released2025–2026

Max context262k

About

SK Telecom A.X large language model family distributed on Hugging Face.

Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.

2 in view

A.X K2Current

Use when the workload needs 262k context.

2026-07262k context

A.X K1Current

Use when the workload needs 131k context.

2025-12131k context

Current A.X variants with use-when guidance and lifecycle status
Model	Use when	Released	Signals	Status
A.X K2	Use when the workload needs 262k context.	2026-07	262k context	Current
A.X K1	Use when the workload needs 131k context.	2025-12	131k context	Current

2 release groups

2026-07

1 current

262k context

Current

2025-12

1 current

131k context

Current

A.X model specifications comparison
Model	Released	Context	Parameters
A.X K2	2026-07	262k	688B total, 33B active
A.X K1	2025-12	131k	519B total, 33B active

A.X K2

A.X K1