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Access all the latest models, easily!

Chat-O has always been about instant access to the very best AI models. That promise has only grown stronger: in one place you can talk with xAI’s Grok 3, Google’s multimodal Gemini 2.5, and OpenAI’s o3 and o4 models. We integrate new releases the same day they drop, so you never wait to try the latest breakthroughs. This was the start of an expansion that brought GPT-5, GPT-OSS-120B, and most recently the Kimi K3 and GLM-5.2.

Model Breakdown

Grok 3

xAI’s third-generation model, trained with ten times the compute of Grok 2:

  • Real-time knowledge: Integrated with X (Twitter) for current events
  • Direct, unfiltered responses: Less refusal bias than many competitors
  • Strong reasoning: Competitive with GPT-4 class models on math and logic
  • Code generation: Solid performance across major programming languages

Grok 3’s real-time awareness makes it uniquely valuable for news analysis, market research, and topics requiring up-to-the-minute context.

Google Gemini 2.5

Google’s most advanced model family with native multimodality:

  • 1M token context window: Process entire codebases, long documents, or hours of video
  • Native multimodal: Understands text, images, audio, and video natively
  • Strong reasoning: Competitive leaderboard performance
  • Google ecosystem integration: Deep understanding of Google services and formats

The 1M token context was revolutionary—enabling use cases like analyzing full codebases or processing complete legal documents in one pass. Later models like GLM-5.2 would push this even further with million-token reasoning capabilities.

OpenAI o3 and o4

OpenAI’s reasoning-focused models:

  • o3: Strong step-by-step reasoning for complex math, science, and coding
  • o4: Faster inference with maintained reasoning quality, optimized for production
  • Chain-of-thought: Transparent reasoning process
  • Tool use: Excellent function calling and structured output support
Model Best For Context Speed Key Strength
Grok 3 Real-time, news 128K Fast Current events awareness
Gemini 2.5 Multimodal, long docs 1M Moderate Massive context window
o3 Complex reasoning 128K Slow Deep chain-of-thought
o4 Production reasoning 128K Fast Balanced speed/quality

All Your Favorite Models, One Seamless Workspace

Mix and match Grok 3, Gemini 2.5, and OpenAI models inside a single conversation. Fork chats to explore “what-if” ideas without losing your original thread. It’s like having a panel of expert consultants on demand, 24/7. The lineup has since expanded to include the Complete Kimi Family and Complete Z-AI GLM Family, giving you even more perspectives.

Chat-O at a Glance

Feature What It Means for You
Multi-Model Chat Instantly switch between models or let them collaborate
Mobile Apps Native iOS & Android
Image Creation & Editing Generate and refine visuals with simple prompts
Image Upload & Analysis Detailed context and object detection
Conversation Forking Branch chats to explore alternatives
Projects Group related work under one roof
Speed Optimized servers + streaming responses
Privacy First No data resale, no training on your data

The Power of Multiple Perspectives

A single AI can be brilliant, but a team of AIs is next-level. Compare a technical explanation from Grok 3 with a creative rewrite from Gemini 2.5, then have o4 tighten the prose. With multi-model threads, you orchestrate the conversation like a conductor leading a symphony. For a detailed comparison of today’s most advanced reasoning models, see our GLM-5.2 vs Kimi K3 comparison.

Since This Launch

The models announced here were just the beginning. Since April 2025, our lineup has grown to include:

We’re Building the Best AI Chat on Earth—With You

Your feedback drives our roadmap. Every week we roll out tweaks, polish, and new capabilities. Tell us what you love (or what’s missing) and we’ll keep refining.

Don’t wait—join Chat-O today and experience the future of AI collaboration.

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