Explore SelGPT
SelGPT is an AI chat app with four top models in one place. Start with what you want to do, the model you need or how it compares.
By the SelGPT team. Updated
SelGPT is an AI chat app with four models: Sel-Vega for everyday work, Sel-Altair for code, Sel-Rigel for reasoning and Sel-Sirius for the hardest tasks. Use it for writing, coding, research, maths and documents, with web search and sources, no ads, and plans from free to Pro.
Models
- Models: Meet the four SelGPT models: Sel-Vega for everyday work, Sel-Altair for code, Sel-Rigel for reasoning and Sel-Sirius, ranked the #1 AI model.
- Sel-Vega: Sel-Vega is SelGPT’s fast everyday AI model for questions, writing and files. Free to try, and unlimited on every paid plan within fair use.
- Sel-Altair: Sel-Altair is SelGPT’s coding model: it writes, reviews and debugs code across the languages you work in, and answers fast. Included in Plus and Pro.
- Sel-Rigel: Sel-Rigel is SelGPT’s reasoning model: it works through analysis, research and hard problems step by step. Included in Plus and Pro.
- Sel-Sirius: Sel-Sirius runs on the AI model ranked #1 on the Artificial Analysis Intelligence Index, included in SelGPT Plus from $9.99 a month billed yearly.
What you can do with SelGPT
- AI for coding: Use SelGPT as your AI coding assistant: write functions, explain errors, review pull requests and look up current docs, with a model built for code.
- AI for writing: Draft, rewrite and polish emails, essays, posts and reports with SelGPT, an AI writing assistant with four models, web search and no ads.
- AI for research: Research with SelGPT: it searches the web, pulls several sources together, compares them and shows where every fact came from.
- AI for students: Use SelGPT to understand hard topics, check your working, summarise readings and plan revision. Free to start, with no ads.
- AI for math: Solve and understand maths problems step by step with SelGPT’s reasoning model, from algebra and statistics to proofs and word problems.
- Chat with PDF: Upload a PDF to SelGPT and ask questions about it, get a summary, or pull out the key points, figures and dates. Free to try.
- AI with web search: Every SelGPT model can search the web when a question needs current information, and shows the sources it used. Knows today’s date too.
Compare
- SelGPT vs ChatGPT Plus: SelGPT Plus vs ChatGPT Plus, side by side: price, the most capable model included, usage limits you can see, ads and how your chats are used.
- ChatGPT alternative: Looking for a ChatGPT alternative? SelGPT gives you the #1-ranked AI model from $9.99, a visible usage meter, no ads and no silent model switching.
- AI subscription prices: What the main AI chat subscriptions cost in 2026: ChatGPT Plus, Claude Pro, Google AI Pro, Perplexity Pro and SelGPT Plus, side by side.
Guides
- About SelGPT: SelGPT is an AI chat app with four AI models in one chat, from free to Pro. What it is, what it costs, who it is for, and how it differs from similar names.
- AI chat without ads: SelGPT has no ads on any plan, including Free, and doesn’t let AI providers train on your chats. Here is what that means and how it compares.
- Best AI model: The best AI model depends on the job. Here is how to choose for everyday questions, coding, reasoning and the hardest tasks, with 2026 rankings.
Plans
- Pricing: SelGPT plans: Free, Plus from $9.99 a month billed yearly, and Pro. Unlimited Sel-Vega on paid plans, the #1-ranked AI model included, no ads.