What are A.X-K2's benchmark scores?

As of 25 Oct 2026, A.X-K2 scores 52.6 ±4.8 on the BenchLeader Index, strongest in long context (60) and weakest in agents & tools (44). That rests on 5 independent benchmark results, and every score on this page links to its publisher.

How does A.X-K2 rank?

A.X-K2 is #312 of 785 ranked configurations on 25 Oct 2026. 304 other configurations score within its margin, so the exact position matters less than the band. The leader is Claude Opus 5.5 (max effort) at 72.6.

When was A.X-K2 released?

SK Telecom released A.X-K2 on 12 Aug 2026.

SK TelecomOpen weightsReasoning modelCompare with another model

A.X-K2

A.X-K2 is a SK Telecom open-weights reasoning model, released 12 Aug 2026. Its best configuration ranks #312 of 785 on the BenchLeader Index at 52.6 ±4.8, in the upper half. The ± is the point: 304 other configurations score within that range, so they and this one cannot be told apart on quality alone — price and speed are what separate them. It scores highest in long context (60) and lowest in agents & tools (44). Last measured 12 Aug 2026.

Blended price: –
Output speed: –
First answer: –
Context: 262k
Full answer: –
Cost per run: –
Released: 12 Aug 2026

How it scores by categoryDashed line = average model (50). One step of 15 = one standard deviation.

Overall index53
Reasoning55
Agents & tools44
Knowledge58
Long context60
Composite54

How its index has moved

19 Sept 2026 to 19 Oct 2026

The index is recomputed from scratch every day, so a line moves when a new benchmark result lands, when a publisher revises a score, or when the models it is normalised against change. Early movement usually means the score is still settling.

Benchmark results

See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.

Reasoning

Benchmark	not stated	Source
GPQA Diamond (AA)not in index	85.7%#120	Artificial Analysis
Humanity's Last Exam (AA)not in index	29.6%#155	Artificial Analysis
CritPt	8.9%#132	Artificial Analysis

Coding

Benchmark	not stated	Source
SciCode (AA)not in index	41.0%#168	Artificial Analysis
Terminal-Bench 4.0 (AA)not in index	0.0%#152	Artificial Analysis
Terminal-Bench 2.1 (AA)not in index	39.0%#141	Artificial Analysis

Agents & tools

Benchmark	not stated	Source
GDPval-AA v2.1not in index	23.0%#98	Artificial Analysis
τ³-Banking (AA)	16.1%#112	Artificial Analysis
AutomationBenchnot in index	2.5%#178	Artificial Analysis
GDP.pdf (AA)not in index	6.4%#152	Artificial Analysis

Knowledge

Benchmark	not stated	Source
AA-Omniscience	-8.2#178	Artificial Analysis
AA-Omniscience: accuracynot in index	18.6%#330	Artificial Analysis
AA-Omniscience: non-hallucinationnot in index	67.0%#57	Artificial Analysis

Long context

Benchmark	not stated	Source	Trend
AA-LCR	70.0%#215	Artificial Analysis

Composite

Benchmark	not stated	Source	Trend
AA Intelligence Index v4.3.2	21.5#213	Artificial Analysis

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Questions people ask

What are A.X-K2's benchmark scores?: As of 25 Oct 2026, A.X-K2 scores 52.6 ±4.8 on the BenchLeader Index, strongest in long context (60) and weakest in agents & tools (44). That rests on 5 independent benchmark results, and every score on this page links to its publisher.
How does A.X-K2 rank?: A.X-K2 is #312 of 785 ranked configurations on 25 Oct 2026. 304 other configurations score within its margin, so the exact position matters less than the band. The leader is Claude Opus 5.5 (max effort) at 72.6.
When was A.X-K2 released?: SK Telecom released A.X-K2 on 12 Aug 2026.

Data as of 25 Oct 2026. Compare with another model.

Cite as: BenchLeader, “A.X-K2: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/a-x-k2.