General Purpose Chatbotsfree

K2 Think

MBZUAI/G42 chat app for the open Apache-2.0 K2 Think V2 reasoning model, served on Cerebras

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What K2 Think does

  • MBZUAI/G42 chat app for the open Apache-2.0 K2 Think V2 reasoning model, served on Cerebras
  • Web, iOS and Android with Google or Apple sign-in and chat history sync
  • No subscription or in-app purchases

K2 Think — straight answers

What is K2 Think?

K2 Think is listed under General Purpose Chatbots, in the AI Chat & Assistants category on Flocci AI Tools. MBZUAI/G42 chat app for the open Apache-2.0 K2 Think V2 reasoning model, served on Cerebras. It is free, with no paid plan attached, and it lives at k2think.ai.

Is K2 Think free?

K2 Think is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

Can I use K2 Think in a browser, or is there an app?

K2 Think works in a normal browser tab with no install. It is available on the web, iOS and Android. You can sign in with a Google account.

What can K2 Think do?

K2 Think does 3 things the catalog singles out: Mbzuai/g42 chat app for the open apache-2.0 k2 think v2 reasoning model, served on cerebras; web, ios and android with google or apple sign-in and chat history sync; no subscription or in-app purchases.

What is the best free alternative to K2 Think?

Apertus Chat (Public AI) is the closest free alternative: it sits in the same General Purpose Chatbots sub-category and is free. Falcon LLM Chat (TII), Google AI Mode and HuggingChat also start free. The full list is on the alternatives page.

See the full list →

K2 Think alternatives

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ChatGPT

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  • Free tier on OpenAI's fast GPT-6/GPT-5.x 'Luna' models, with a Think button for harder questions
  • Voice, vision, image generation and web search in one app
  • Agent mode, projects, memory and file uploads
  • Custom GPTs and a large app/connector ecosystem
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Claude

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freemium
  • Free tier on Anthropic's Claude 5 family (Sonnet-class model by default)
  • Top-tier coding, writing and long-document reasoning
  • Artifacts for live code, document and app previews
  • Projects, memory, web search and MCP tool connectors
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Gemini

General Purpose Chatbots
freemium
  • Free tier on Gemini 3.x Flash models, with limited access to the top Pro model
  • Very long context for whole books, codebases and long videos
  • Deep Google Workspace and real-time Search integration
  • Native image (Nano Banana) and video (Veo) generation, Gemini Live voice
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Grok

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freemium
  • Free, rate-limited access to xAI's latest Grok 4.x models
  • Live data from X and the open web
  • Grok Imagine for image and video generation
  • Fast, less-filtered conversational style
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DeepSeek

General Purpose Chatbots
freemium
  • Free web and app chat on DeepSeek's V4-series models
  • Instant and Expert (deep-thinking) modes
  • Strong math, coding and reasoning at open-model cost
  • Models are also released as open weights
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Microsoft Copilot

General Purpose Chatbots
freemium
  • Free tier mixing frontier OpenAI models with Microsoft's own MAI models
  • Built into Windows, Edge and Microsoft 365
  • Voice, vision and image generation
  • Copilot Vision can see and talk through your screen
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Head-to-head comparisons

K2 Think vs ChatGPTK2 Think vs ClaudeK2 Think vs GeminiK2 Think vs GrokK2 Think vs DeepSeekK2 Think vs Microsoft Copilot