Model vs model

Grok 4.1 Fast vs A.X-K2

A debate-ready pair page: current winner, strongest alternative, decisive benchmarks, and the warning that should travel with the claim.

Use case · Everyday chatbot
Winner · Grok 4.1 Fast
Sources · All public sources

Winner

Grok 4.1 Fast

xAI

9benchmarks won

Chat / text

Versus · Everyday chatbot

Grok 4.1 Fast leads this compare set for everyday chatbot.

Grok 4.1 Fast9 of 9 wins

Verified and stable

0 shared benchmarks are still too close to call, so the win stays conditional. This compare uses all public sources, with provider-official evidence labeled separately.

Close calls: 0
Sources: All public

Full compare workspace Disagreement page

100%win share

Model vs model

Grok 4.1 Fast vs A.X-K2

A debate-ready pair page: current winner, strongest alternative, decisive benchmarks, and the warning that should travel with the claim.

Use case · Everyday chatbot
Winner · Grok 4.1 Fast
Sources · All public sources

Winner

Grok 4.1 Fast

xAI

9benchmarks won

Chat / text

Versus · Everyday chatbot

Grok 4.1 Fast leads this compare set for everyday chatbot.

Grok 4.1 Fast9 of 9 wins

Verified and stable

0 shared benchmarks are still too close to call, so the win stays conditional. This compare uses all public sources, with provider-official evidence labeled separately.

Close calls: 0
Sources: All public

Full compare workspace Disagreement page

100%win share


Intelligence Index AA · index Text · Chat / text	1758.8% exact aliasverified runtime Row details Raw value 17 Percentile 58.8% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	35n/a exact aliasverified runtimeContext only Row details Raw value 35 Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
Openness Index AA · index Text · Chat / text	65.4% exact aliasverified runtime Row details Raw value 6 Percentile 5.4% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Reasoning) Source row	50n/a exact aliasverified runtimeContext only Row details Raw value 50 Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
GPQA AA · % Text · Reasoning / math / science	63.7%48.3% exact aliasverified runtime Row details Raw value 63.7% Percentile 48.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	85.7%n/a exact aliasverified runtimeContext only Row details Raw value 85.7% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
Humanity's Last Exam AA · % Text · Reasoning / math / science	5.1%40.3% exact aliasverified runtime Row details Raw value 5.1% Percentile 40.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	29.6%n/a exact aliasverified runtimeContext only Row details Raw value 29.6% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
CritPt AA · % Text · Reasoning / math / science	0%60.3% exact aliasverified runtime Row details Raw value 0% Percentile 60.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	8.9%n/a exact aliasverified runtimeContext only Row details Raw value 8.9% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
SciCode AA · % Code · Coding	29.6%48.6% exact aliasverified runtime Row details Raw value 29.6% Percentile 48.6% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	38.5%n/a exact aliasverified runtimeContext only Row details Raw value 38.5% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
AA-Omniscience accuracy AA · % Text · Chat / text	17.2%43.7% exact aliasverified runtime Row details Raw value 17.2% Percentile 43.7% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	18.6%n/a exact aliasverified runtimeContext only Row details Raw value 18.6% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
AA-Omniscience non-hallucination AA · % Text · Chat / text	17.7%53.6% exact aliasverified runtime Row details Raw value 17.7% Percentile 53.6% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	67%n/a exact aliasverified runtimeContext only Row details Raw value 67% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a
Long Context Reasoning AA · % Document · Long context	28.7%44.3% exact aliasverified runtime Row details Raw value 28.7% Percentile 44.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Grok 4.1 Fast (Non-reasoning) Source row	66%n/a exact aliasverified runtimeContext only Row details Raw value 66% Percentile n/a Last updated recent Eligibility benchmark_derived_model Identity provider alias (0.94) Source label A.X-K2 Source row	n/a

Intelligence Index

AA · index

Text · Chat / text

1758.8%

exact aliasverified runtime

Row details

Raw value: 17
Percentile: 58.8%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Grok 4.1 Fast (Non-reasoning)

Grok 4.1 Fast vs A.X-K2

Grok 4.1 Fast

Grok 4.1 Fast leads this compare set for everyday chatbot.

Loading model comparison.

Grok 4.1 Fast vs A.X-K2

Grok 4.1 Fast

Grok 4.1 Fast leads this compare set for everyday chatbot.

A.X-K2

Grok 4.1 Fast case

A.X-K2 case

What changes the outcome

Why this result is surprising

Why this is not a clean win

Share the recommendation with the source data attached.

Open or copy the stable surfaces

Use the exact public framing

Pick the voice before you post

Compose a post that keeps the warning attached

Decisive benchmarks