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SK Telecom: A.X K2

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a-x-k2

A.X K2 is SK Telecom’s open-weights AI model, released Jul 29, 2026.

Context
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Input
— / 1M
Output
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Released
Jul 29, 2026
Modalities

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where A.X K2 lands among all models tracked on Model Beat.

40.0
Intelligence Index
Artificial Analysis
40th percentile of tracked models
31.0
Coding Index
Artificial Analysis
31st percentile of tracked models

Reasoning

2 evals
GPQA Diamond85.7%

Graduate-level scientific reasoning

Humanity's Last Exam29.6%

Frontier of human expert knowledge

Coding

1 evals
SciCode41.0%

Scientific research coding

In the news

1

Changelog

1
  • A.X K2: reported SciCode score rose from 38.5% to 41.0% (+6%)benchmark · Sep 5, 2026

Compare A.X K2 with

A.X K2 vs GPT-6 AstraA.X K2 vs Claude Fable 5A.X K2 vs Kimi K3A.X K2 vs Grok 4.6A.X K2 vs DeepSeek-V4-Pro-0813

Frequently asked questions

What is A.X K2?

A.X K2 is an AI model, from SK Telecom, released Jul 29, 2026.

Who created A.X K2?

A.X K2 is an AI model developed by SK Telecom, released Jul 29, 2026.

How does A.X K2 perform on benchmarks?

On standardized evaluations tracked by Epoch AI, A.X K2 scores 29.6% on Humanity's Last Exam, 85.7% on GPQA Diamond, 41.0% on SciCode.

Is A.X K2 open source?

A.X K2 is released with open weights (Open weights (unrestricted)), so the model can be downloaded and self-hosted.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 17, 2026.