All AI models in one app, and how to pick the right one

Having all AI models in one app means you open one chat and choose which model answers each message, from makers such as OpenAI, Anthropic, Google, xAI, Meta and DeepSeek. In AiFevo you switch models from a menu under the message box, compare their answers, and pay for one plan instead of several.

If you can pick any model, which one should you pick? This guide explains why models differ and which family to try for common jobs.

Why AI models give different answers

Every model is trained by a different team, with different data, goals and trade-offs. Some are tuned to write natural, careful prose. Some are built to be quick and cheap for everyday questions. Others spend more effort on step-by-step reasoning, or can read very long documents in one go.

So the same question can come back with a different tone, structure or level of detail. Often the useful move is to read two and take what’s good from each.

The models in AiFevo

At the time of writing, AiFevo includes chat models from several makers:

• OpenAI: GPT-6 Astra and GPT-5.6 Luna
• Anthropic: Claude Fable 5.1, Claude Sonnet 5 and Claude Sonnet 4.6
• Google: Gemini 3.8 Flash (reads images, documents and very long files) and Gemini 3.7 Flash
• xAI: Grok 4.7 and Grok 4.3
• Meta: Muse Spark 1.3, 1.2 and 1.1
• DeepSeek: V4 Pro (quick questions and summaries) and V4.1 Flash (maths and step-by-step reasoning)
• Others: Qwen3.8 Omni Flash, GLM 5.3 and GLM 5.3 Flash

There are image models too, for pictures made in Image Studio. The list changes as new models arrive, so the models page always has the current set and which plan includes each one.

Which model to try for which task

The suggestions below come from how each model is described in AiFevo’s own model menu, not from benchmarks. Treat them as a starting point, then trust what works for you. For a deeper task-by-task guide, see the best AI model for each task.

Writing

For anything where tone matters, such as a cover letter, a blog post or a delicate email, the Claude models are a good place to start. Give them context and the voice you want:

“Rewrite this email to a client so it sounds warm but firm. Keep it under 150 words and don’t add any new promises.”

Note that Claude models are on the Pro plan at the time of writing. On other plans, try a couple of the chat models yours includes and keep the one whose style you like.

Quick questions and summaries

For short questions, a lighter model is often all you need, and it replies fast:

“Summarise this article in five bullet points, then one line on why it matters.”

Maths and reasoning

DeepSeek V4.1 Flash is described as strong at maths and showing its working. Ask for the steps, not just the result:

“Solve this step by step and explain each step in one sentence. Then check your answer a different way.”

Long documents

On paid plans you can attach PDFs and other files. For a long report or a thick set of notes, Gemini 3.8 Flash is built to read a lot at once:

“Read the attached report. List the five main findings, and for each one quote the sentence it comes from.”

Comparing answers from two models

One of the most useful habits with several models is asking the same thing twice. Send your question, read the answer, then switch the model in the menu and ask again. You’ll quickly see where the two agree, which usually means the point is solid, and where they differ, which tells you what to check.

You can also make one model review another:

“Here is an answer from another AI. Point out anything that is unclear, missing or possibly wrong. Don’t rewrite it, just list the issues.”

This works especially well for writing and planning. We go deeper on it in our guide to AI for writing and research.

Super Fevo picks for you

If you’d rather not think about models at all, choose Super Fevo. It’s AiFevo’s own option that picks a model for each question, so you can simply ask and let it decide. It’s on every plan, including Free, and it’s the easiest way to start.

You can still pick a specific model for any single message whenever you want more control.

One plan instead of several subscriptions

Using several AI makers separately means several accounts and often several bills. In AiFevo, one plan covers every model it includes:

• Free: 10 messages in any 24 hours on five everyday models, including Super Fevo and DeepSeek. No card needed.
• Starter: 15 models (10 chat and 5 image), web search with sources, Image Studio and file uploads.
• Pro: all 27 models at the time of writing (18 chat and 9 image), including Claude.

Prices are set in Nepalese rupees and plans never renew automatically. See pricing for the current details, read our ChatGPT alternative guide for a longer comparison, or why one AI subscription beats paying for five for the money side.

Other things that come with every chat

Whichever model answers, you can speak your question, have any answer read aloud, edit your message, regenerate the latest answer and share an answer with a link. AiFevo replies in the language you write in and is tuned for English, Hindi and Nepali. Chats are saved to your account, on any device. The features page has the full list.

Frequently asked questions

Can I really use different AI models in the same chat?

Yes. In AiFevo you choose the model from the menu under the message box, and you can change it before any message. The conversation continues with the new model, so you can compare answers without starting over or copying text between apps.

Which AI model should I choose?

Start with Super Fevo, which picks a model for each question. When you want more control, try a Claude model for writing, GPT-5.6 Luna or a Gemini Flash model for quick answers, DeepSeek V4.1 Flash for maths, and Gemini 3.8 Flash for long documents. Then keep what works for you.

Are all models available on the free plan?

No. The Free plan includes five everyday models, among them Super Fevo, DeepSeek V4 Pro and GLM 5.3. Starter adds more chat models and image models, and Pro includes every model at the time of writing. The models page shows which plan includes each one.

Do I need to install anything?

No. AiFevo is a web app that runs in any modern browser on phones and computers. You sign up with email or Google, and your chats are saved to your account, so you can use them on any device you sign in on.

Can AI models be wrong?

Yes, every model can make mistakes, including confident ones. Comparing two models helps you spot weak points, and on paid plans web search shows the sources behind an answer. Always check important facts, figures and dates yourself before relying on them.

Try it yourself

The quickest way to see how models differ is to ask two of them the same question. Start free, ask something you care about, then switch the model and ask again.