AI WORLD HQHow to Pick a Gemini Model and Check Which One Answered Your Question
Learn how to switch Gemini models in the chat box, set how deeply they think, and confirm which model wrote your answer.
This guide was written by AI. It passed automated fact and quality checks, and our editor spot-checks published guides every day.
See AI World HQ first on GoogleAdd us as a preferred source and our stories show up higher in Google’s Top Stories.Add on GoogleHave you ever asked an AI tool a hard question and felt the answer was too shallow? This guide shows you how to choose a Gemini model yourself, decide how much thinking it does, and confirm which model wrote your answer. It's for anyone with a personal Google Account who wants more control over Gemini. By the end, you'll know where each setting lives on a computer and what your plan allows.
💡 Tip: tap a step’s number when you finish it — a green tick appears and your browser remembers how far you got.
- A personal Google Account. The steps below describe a personal account. Model availability is subject to change, so Google's official help center is the place to confirm the current details.
- A Google AI plan, if you want to choose a specific model. Google says some models are only available with paid Google AI plans. Without one, Gemini picks the model for you.
- A computer with a web browser. These steps follow Google's computer instructions. Phone screens can look different.
- About 10 minutes.
Sign in and open Gemini on your computer
Open your web browser and go to gemini.google.com. Sign in with the personal Google Account you want to use. You should see Gemini's main screen, with a chat area in the middle and a message box near the bottom. If you have more than one Google account, make sure you pick the one connected to your Google AI plan, if you have one.
Nothing is sent to Gemini yet. You are only opening the screen where you will change the model. If the page looks different, for example because the layout has been updated, look for a chat or "new chat" option, or check Google's official help center, which has the current layouts.
you can see a chat area and a message box at the bottom of the screen.
Find the model label in the chat box
Start a new chat so your settings apply cleanly from your first message. Look at the bottom of the chat box, right where you would type. Near it, you will see the model that is currently selected. Google's help center explains that this is the model that will answer your next message, so this label is your check before you type.
Don't type anything yet. Just find the label and note which model is selected right now. If nothing matches, the official help center has up-to-date instructions.
you can point to the selected model's name at the bottom of the chat box.
If you don't see one, look for a small button or dropdown near the message box, since the layout changes over time.
Open the model list and choose a model
Click the model label at the bottom of the chat box. A list of models opens. Google describes its models for different jobs: some are built for quick everyday answers, and others are designed for complex, multi-step problems. Read the short description next to each one and pick the one that fits your question. Click the model you want.
Some higher-tier models have a small lock icon next to them. Google says those require an eligible plan upgrade, so if you see a lock, your current plan doesn't include that model. Choose an unlocked model instead, or check the official help center for which plan includes which models. Your next message will go to the model you chose.
Even a strong model can make mistakes, so double-check anything important, such as dates, numbers, or instructions you plan to follow. If the model you want is locked, pick another one and keep going.
your answer appears and the chat box still shows the model you selected.
Set the thinking level
Look for thinking levels near the model choice. Google lists three: Low, Medium, and High. Low gives fast, concise answers for straightforward questions. Medium balances speed and depth for everyday tasks. High lets the model reason carefully through complex, multi-step prompts. Pick the level that matches your question.
If you don't choose a level, Google says it defaults to Low. Higher levels usually take longer and use more of your plan's usage, so save High for problems that really need careful thought. Google also says that if you return to the same conversation later, Gemini keeps the model and thinking level you chose there.
the level you chose is shown before you send your question.
If you can't find the thinking levels, look for a small menu near the model name, or check the official help center.
Check which model answered
After you get a response, you may want to confirm which model wrote it. Google's help center says that on a computer, you can go to a chat from the sidebar, then click More at the bottom of a response. From the menu, select Show thinking steps. A panel shows the steps the model took.
Scroll to the bottom of those steps, and you will find which model was used. This matters because auto model selection can choose a model for you. Checking this is the most reliable way to know which model actually answered.
you can see the model name listed at the end of the thinking steps.
If you don't see More or Show thinking steps, the menu may be labeled differently, so check the official help center.
Decide whether auto model selection should be on
Auto model selection lets Gemini choose the model and thinking level for each prompt. Google says it routes prompts to an efficient option to preserve your usage. If you want every answer to come from the model you picked, turn it off. On a computer, click Settings at the bottom left, open Usage limits, and at the bottom of that page, turn auto model selection on or off.
Turn it off if you want full control. Google says that when it's off, responses use a default fast model unless you have chosen another model in the chat. Also note that if you reach your plan's usage limit, Google says your chat continues with a faster model. Turn the setting back on whenever you'd rather Gemini decide.
the auto model selection switch shows the setting you chose.
- Assuming your chosen model always answers. Auto model selection can route prompts elsewhere. The fix is Step 5: check the thinking steps to see which model wrote the answer.
- Choosing High thinking for every question. Simple questions don't need deep reasoning, and higher levels use more of your usage. The fix is Low for quick questions and Medium or High for harder problems.
- Expecting a locked model to open for free. Google says higher-tier models marked with a lock need an eligible plan upgrade. The fix is to check the official help center for plan details, or pick an unlocked model.
Open gemini.google.com on your computer, find the model label at the bottom of the chat box, and note which model is selected. You'll know you're ready when you can say which model your next question will use.
❓ Quick questions
How long does this take?
About 6 minutes — the guide has 6 steps, and you can tick each one off as you go.
Which tool do I need?
This guide uses Google Gemini — but the approach works very similarly in other AI assistants.
Do I need to prepare anything?
- A personal Google Account. The steps below describe a personal account. Model availability is subject to change, so Google's official help center is the place to confirm the current details.
- A Google AI plan, if you want to choose a specific model. Google says some models are only available with paid Google AI plans. Without one, Gemini picks the model for you.
- A computer with a web browser. These steps follow Google's computer instructions. Phone screens can look different.
- About 10 minutes.
What mistakes should I avoid?
- Assuming your chosen model always answers. Auto model selection can route prompts elsewhere. The fix is Step 5: check the thinking steps to see which model wrote the answer.
- Choosing High thinking for every question. Simple questions don't need deep reasoning, and higher levels use more of your usage. The fix is Low for quick questions and Medium or High for harder problems.
- Expecting a locked model to open for free. Google says higher-tier models marked with a lock need an eligible plan upgrade. The fix is to check the official help center for plan details, or pick an unlocked model.
Keep reading
📬 The week’s AI, in your inbox
One friendly email every Sunday — the 5 stories that mattered, in plain English. No spam, unsubscribe anytime.
✦ Generated by AI in AI World HQ's automated newsroom, written in plain language. Checked by automated fact and quality gates, and our editor spot-checks published guides every day. Spot a mistake? Use the buttons above.
← Back to all stories