Which chat model should I use?
The world's best AI models, 52+ of them across chat, image and video, in one place. We help you pick the right one.
Most AI tools lock you into a single model. Omni gives you the full range from the leading AI labs (OpenAI, Anthropic, Google, Mistral, Perplexity and more), so you can match the model to the task, the budget, and your preferences. Here's how to choose your chat model.
The simple rule
Match the model to the task. Routine work? Use a cheap, fast model. Hard or high-stakes work? Step up to a premium one. Analysing an image? Use a fast vision model. You stay in control of quality and cost.
The tiers
💸 Budget: everyday, high-volume work Fast and cheap. Drafts, summaries, quick replies, repetitive tasks. e.g. GPT-5 mini, Gemini Flash Lite, Mistral Small
⚖️ Workhorses: your daily drivers The best mix of quality and cost for most work. e.g. Claude Sonnet, GPT 5.4, Gemini 3.1 Pro
🖼️ Image and vision: for your attachments Fast models built to read photos, screenshots and scans. e.g. GPT-4o, GPT-4o mini
⭐ Premium and pro: for the hard stuff Top-tier reasoning for complex, high-stakes work. Worth it when the problem demands it. e.g. Claude Opus, GPT 5.5, plus "pro" models and Claude Fable 5 for the very toughest jobs
🛠️ Specialists: for specific jobs Coding: GPT Codex for speed, top reasoning models for complex work. Grounded, cited answers: Perplexity Sonar. European model: Mistral.
Quick picker
Note: Fable 5 was temporarily disabled by Anthropic at the request of the US Government. We are expecting it to become available again soon.
You want to... | Reach for |
Knock out a quick draft or summary | A budget model |
Write or analyse something properly | Claude Sonnet |
Read an image or screenshot you've attached | GPT-4o |
Work through a long document | Gemini 3.1 Pro (huge context) |
Write or fix code | GPT Codex for speed, GPT 5.5 or Claude Opus for complex work |
Find out what's happening right now | Perplexity Sonar |
Crack a genuinely hard problem | Claude Opus, upgrade to Fable or GPT Pro models for the hardest problems |
Use a European-built model | Mistral |
Two worth knowing about
🇪🇺 Mistral: Europe's frontier model. Built in France, strong across European languages, from Europe's leading AI lab. The natural choice if you'd rather work with a European AI partner.
🎯 Claude Fable 5: the specialist. The most powerful model we offer. It costs more, so it's not for everyday tasks, but when you've got a genuinely hard, high-stakes problem, it's the best tool in the box, whether it’s coding, knowledge work or anything else.
That's the Omni advantage: not just more AI, but the right AI, for whatever you're working on. Browse all 52+ models in Omni →