LLM Reference

A.X K1

Released
2025-12-28
Last refreshed
2026-08-27
Status
Researched today
Commercial use: unknownLong context

A.X K1 is a released long context model with 131k context; evaluate it while provider pricing coverage matures.

Use it for

  • Teams evaluating long context
  • Workloads that can use a 131k context window

Do not use it for

  • Cost-sensitive launches that need sourced token pricing
  • Vision or document-understanding workloads
  • Strict JSON or tool-calling flows
Specifications
Family
A.X
Released
2025-12-28
Context
131k
Parameters
519B total, 33B active
Weights
Available
Code
Unknown
Pricing

No tracked provider token pricing is available yet.

About

A.X K1 is SK Telecom's mixture-of-experts language model released December 28, 2025 with 519B total / 33B active parameters and a 131,072-token context window. Weights are on Hugging Face at skt/A.X-K1.

Top use-case fit

Long context

Included by capability and metadata signals in the decision map.

Provider price ladder

No tracked provider token pricing is available for this model yet.

Capabilities

No model capability flags are currently sourced.

Benchmark peer barsfor Long context

No task-mapped benchmark peers are available for this model yet.

Migration checks

No linked migration route is available for this model yet.