benchmarks
Grok 4.1 is xAI’s conversational model, with reasoning and non-reasoning modes and reported improvements in emotional understanding, creative writing and factual reliability. Grok 4.1 Fast subsequently launched as a separate variant; its API specifications and pricing should not be attributed to Grok 4.1.
Benchmark results
Every figure links to where it was published. Compare like with like — harnesses and prompt setups differ between vendors.
| Benchmark | Score | Source |
|---|---|---|
| LMArena TextHuman preference Elo from blind chat votes (not a percentage) | 1436 Elo22 Oct 2026 | View |
| LMArena WebDevHuman preference Elo for building web apps (not a percentage) | 1215 Elo23 Oct 2026 | View |
No verifiable benchmark results yet — score pending.
Capabilities
- Conversational responses attentive to emotional tone and user intent.
- Creative writing with attention to voice, style and narrative coherence.
- Reasoning-enabled responses for questions requiring deliberation.
- Non-reasoning conversational responses.
- General factual question answering, with independent verification still necessary.
What improved
- xAI reports stronger emotional understanding than Grok 4.
- xAI reports improved creative-writing quality.
- xAI reports fewer hallucinations in its factual-answer evaluations.
Known flaws & limitations
- Factual answers can still contain hallucinations despite the reported reduction.
- Conversational fluency and emotional sensitivity do not guarantee factual correctness.
- Published launch evaluations do not establish reliability across every specialist domain or task.
Risks, safety & security issues
- Residual hallucinations can mislead users who rely on factual answers without independent verification.
- Emotionally fluent responses can encourage misplaced confidence in inaccurate or inappropriate advice.
- Errors can spread when generated answers are republished or incorporated into automated workflows without review.
Good fit for
- Creative drafting, rewriting and brainstorming.
- Conversational assistance where tone and emotional context matter.
- General question answering with source checking.
- Exploratory reasoning with human review.
Poor fit for
- Unsupervised medical, legal or financial decisions.
- Publication of factual claims without independent verification.
- API deployments that assume Grok 4.1 Fast identifiers, context limits or prices apply to Grok 4.1.
Profile last reviewed 10/27/2026 and re-checked automatically every few hours against the vendor's published documentation, papers and public leaderboards. Scores come from the cited benchmark results above — confirm limits and pricing against the provider's own documentation before building on them.