A.X-K2
Public AI IQ model profile with source-backed benchmark results and derived ranking context.
Release and Capabilities
| Public release | 2026-07-29 |
|---|---|
| Modalities | text |
| Context window | 262,144 tokens |
Open weights on Hugging Face under Apache 2.0
Publisher-reported capabilities
- A.X-K2 is a 688B-parameter mixture-of-experts model.
- SK Telecom emphasizes mathematical reasoning, Korean-language performance, coding, and safety-aware completion.
Limitations and availability caveats
- No durable hosted token price was published with the open-weight release.
Official release and model references
Measured Coverage and Estimates
A.x K2 has 10 of 39 tracked IQ benchmark inputs across 4 of 7 dimensions. Raw benchmark tables contain source-backed results only. Derived IQ combines all six dimensions using the shared scoring methodology, including estimates where direct coverage is incomplete.
Among dimensions with direct benchmark coverage, this profile's highest estimated scores are Academic Reasoning (IQ 124) and Reliability (IQ 112). These dimension estimates can include statistical adjustments or predecessor priors; they are not raw benchmark percentages or claims of real-world task success.
Benchmark versions, evaluation harnesses, and coverage affect comparisons; a missing result is not a score of zero. See the scoring methodology for estimation and uncertainty limits.
IQ Dimensions
| Dimension | IQ | Coverage |
|---|---|---|
| Abstract Reasoning | 86 | 0/5 |
| Mathematical Reasoning | 94 | 0/5 |
| Academic Reasoning | 124 | 4/6 |
| Programmatic Reasoning | 101 | 1/6 |
| Computer Use | 100 | 0/5 |
| Reliability | 112 | 2/6 |
| Knowledge Work | 108 | 3/6 |
Benchmark Results
Compare
Frequently Asked Questions
- What is the IQ of A.X-K2?
- A.X-K2 has an estimated IQ of 104, which ranks #92 out of 159 public models on the AI IQ leaderboard. The score combines seven equally weighted reasoning dimensions using measured benchmark results and conservative estimates for missing coverage.
- Is A.X-K2 open source?
- Yes — A.X-K2 is an open-weights model: its trained weights are published, so it can be downloaded and self-hosted.
- When was A.X-K2 released?
- A.X-K2 was publicly released on July 29, 2026.
- How large is the context window of A.X-K2?
- A.X-K2 supports a context window of 262,144 tokens — the amount of text it can consider in a single request.