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Grok (xAI) vs Kimi
A plain-English comparison to help you choose between them.
Two challengers to the default assistants, separated by what they know: Grok reads X and the live web as it answers, Kimi turns research into artefacts you can show. Pick Grok for fast-moving topics, breaking stories and anything a fixed-cutoff model would hedge on, weighing the brand-safety caveat before it becomes a company default. Pick Kimi when the output should be a briefing, a deck or a quick website rather than a feed-fresh answer, on a free tier generous enough to learn every surface before paying.
Side by side
- Summary
Grok is xAI's assistant, distinguished by real-time grounding in X and the live web: it answers about what is happening now, not what the training data remembers.
- Best for
- Real-time answers grounded in X and the live web
- Benchmark-front reasoning on the top models
- Tracking breaking topics as they develop
- Cost
- Freemium (Free tier + paid plans)
- Ease
- Openness
- Hosted service
- Data
- —
- Summary
Kimi is Moonshot AI's everyday assistant, and its distinguishing surfaces are the ones that produce finished artefacts: a deep research mode plus slide and website generation, all from the same conversation.
- Best for
- Deep research briefings on unfamiliar topics
- Prompt-to-deck slides for working presentations
- Quick landing pages and microsites without code
- Cost
- Freemium (Free tier + paid plans)
- Ease
- Openness
- Runs privately (self-hostable)
- Data
- Kimi is a hosted assistant and its API is served from China, so weigh where your prompts and documents travel before routing sensitive work through it; for confidential material, prefer surfaces whose data terms you have checked.
Common questions
What is the brand-safety caveat on Grok?
A permissiveness record, including a documented image-generation safety scandal, that makes it easier to defend as a personal-productivity pick than as a corporate default where brand safety and regulated data are in play. Its looser, opinionated tone is deliberate, and some organisations treat that as governance risk; the more governed assistants are the safer workplace start.
What do the free tiers actually cover?
Grok is free on X and in its own apps within rate limits, with an unusually wide tier range above that, from mid-price plans to heavy top tiers. Kimi's free tier covers everyday assistance plus the headline surfaces, deep research, generated slides and websites, but carries no Kimi Code credits, so coding on the same bill starts at a paid membership tier.
How well grounded are their answers?
Differently. Grok cites live sources and reads public posts as events unfold, but X-sourced answers inherit X's biases and noise, so the citations deserve following. Kimi's deep research is built for open questions worked across the web into a structured briefing. Neither grounds answers strictly in documents you supply; that fenced behaviour belongs to the source-grounded notebooks.
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Tool facts last checked June 2026