# Gemini vs ChatGPT (2026): Same Prompts, Side by Side

Web page: https://bearly.ai/compare/gemini-vs-chatgpt

## How do Gemini and ChatGPT compare?

You can use both in Bearly. Below, we sent the same five work prompts to the models behind Gemini and ChatGPT, using their APIs on October 29, 2026. Read the unedited answers side by side and inspect the Python tests and arithmetic check. These are single examples, not an overall ranking. In Bearly, Council of Experts can ask both at once and summarize their answers; it requires Pro or higher.

Updated October 29, 2026.

## Date and method

Outputs from each model’s API on October 29, 2026; Bearly offers the same models. One independent request per prompt and model, with no system prompt, history, tools, browsing, or retries of completed answers. Each request allowed 4,096 output tokens; temperature and reasoning settings were left at provider defaults. Defaults and token accounting can differ by provider. Answers are unedited and reused wherever the same model appears. This is a small, dated demonstration, not a repeated benchmark or a comparison of the companies’ apps. Bearly publishes this page and offers the models.

## Rewrite a project update

### Exact prompt

Rewrite this paragraph for clarity in at most 80 words. Keep every fact, deadline, and action. Return only the revised paragraph.

Due to the fact that the export currently has an issue in which it drops the timezone on some dates, which was noticed by QA yesterday, we are going to not ship it on Tuesday as previously planned. It is now the plan to ship on Thursday provided that the fix from Mira is reviewed by Leon by Wednesday at noon and QA has verified it by Wednesday at 5 p.m. Please inform support of the change today.

### Gemini 4 Argon

API model: gemini-4-argon. 56 words.

Yesterday, QA noticed that the export drops the timezone on some dates. Because of this issue, we will not ship on Tuesday as planned. We now plan to ship on Thursday, provided Leon reviews Mira’s fix by Wednesday at noon and QA verifies it by Wednesday at 5 p.m. Please inform support of this change today.

### GPT 6.1 Sol

API model: gpt-6.1-sol. 53 words.

QA discovered yesterday that the export drops the timezone on some dates, so we will not ship on Tuesday as previously planned. We now plan to ship on Thursday, provided Leon reviews Mira’s fix by noon Wednesday and QA verifies it by 5 p.m. Wednesday. Please inform support of the schedule change today.

## Summarize a source in five bullets

### Exact prompt

Summarize the following excerpt in exactly five bullets for someone reading a source brief. Use only information in the excerpt. Keep the whole summary under 100 words. Return only the five bullets.

Source: U.S. Constitution, Preamble (public domain), National Archives: https://www.archives.gov/founding-docs/constitution-transcript

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.

### Gemini 4 Argon

API model: gemini-4-argon. 75 words.

* The people of the United States ordain and establish the Constitution for the United States of America.
* One stated purpose of the Constitution is to form a more perfect Union and establish Justice.
* The document aims to insure domestic Tranquility and provide for the common defence.
* Another goal is to promote the general Welfare.
* Finally, the Constitution seeks to secure the Blessings of Liberty for the people and their Posterity.

### GPT 6.1 Sol

API model: gpt-6.1-sol. 59 words.

- The people establish the Constitution for the United States of America to form a more perfect Union.
- They seek to establish justice and ensure domestic tranquility.
- They aim to provide for the common defense.
- They seek to promote the general welfare.
- They aim to secure the blessings of liberty for themselves and future generations.

## Write and test a Python function

### Exact prompt

Write a Python 3 function merge_intervals(intervals). Input is a list of (start, end) integer tuples representing half-open intervals. Return a new sorted list of tuples merging overlapping intervals. Touching intervals must stay separate: [(1, 3), (3, 5)] stays unchanged. Do not mutate the input. An empty input returns []. Raise ValueError if any start >= end. Use only the standard library. Return only one fenced Python code block, with the function and any needed imports, no tests.

We will run these checks:
assert merge_intervals([]) == []
assert merge_intervals([(5, 8), (1, 4), (3, 6)]) == [(1, 8)]
assert merge_intervals([(1, 3), (3, 5)]) == [(1, 3), (3, 5)]
assert merge_intervals([(1, 9), (2, 3), (1, 9)]) == [(1, 9)]
assert merge_intervals([(-5, -1), (-3, 2), (4, 7)]) == [(-5, 2), (4, 7)]
items = [(5, 8), (1, 4)]; original = items.copy(); merge_intervals(items); assert items == original
for invalid in [[(2, 2)], [(4, 1)], [(1, 3), (8, 7)]]:
    try:
        merge_intervals(invalid)
    except ValueError:
        pass
    else:
        raise AssertionError('Expected ValueError')

### Gemini 4 Argon

API model: gemini-4-argon. 57 words.

```python
def merge_intervals(intervals):
    for start, end in intervals:
        if start >= end:
            raise ValueError(f"Invalid interval ({start}, {end}): start must be < end")
            
    if not intervals:
        return []
        
    sorted_intervals = sorted(intervals)
    merged = [sorted_intervals[0]]
    
    for current_start, current_end in sorted_intervals[1:]:
        last_start, last_end = merged[-1]
        if current_start < last_end:
            merged[-1] = (last_start, max(last_end, current_end))
        else:
            merged.append((current_start, current_end))
            
    return merged
```

Python checks: 9/9 passed.

### GPT 6.1 Sol

API model: gpt-6.1-sol. 45 words.

```python
def merge_intervals(intervals):
    for start, end in intervals:
        if start >= end:
            raise ValueError("Interval start must be less than end")

    merged = []
    for start, end in sorted(intervals):
        if merged and start < merged[-1][1]:
            merged[-1] = (merged[-1][0], max(merged[-1][1], end))
        else:
            merged.append((start, end))

    return merged
```

Python checks: 9/9 passed.

## Check a capacity calculation

### Exact prompt

A workshop has 240 seats. At the start of the day, three-fifths of all seats are booked. Then 18 bookings are cancelled and 37 new bookings arrive. The organizer must also reserve 12 seats for crew; crew seats are separate from attendee bookings. How many seats are still available for new attendees? Show your calculation briefly, then end with exactly 'Answer: N seats', replacing N with the number.

### Gemini 4 Argon

API model: gemini-4-argon. 46 words.

* Initial bookings: $\frac{3}{5} \times 240 = 144$ seats
* Updated attendee bookings: $144 - 18 + 37 = 163$ seats
* Total unavailable seats (attendees + crew): $163 + 12 = 175$ seats
* Available seats: $240 - 175 = 65$ seats

Answer: 65 seats

Arithmetic: 65 seats. Expected: 65.

### GPT 6.1 Sol

API model: gpt-6.1-sol. 34 words.

Initially booked: \(240 \times \frac{3}{5} = 144\) seats.  
Updated bookings: \(144 - 18 + 37 = 163\) seats.  
Available after reserving crew seats: \(240 - 163 - 12 = 65\) seats.

Answer: 65 seats

Arithmetic: 65 seats. Expected: 65.

## Explain a technical concept

### Exact prompt

Explain database indexes to a new operations analyst who knows spreadsheets but has never used a database. Use one concrete example and explain one cost of adding an index. Stay under 150 words. Return only the explanation.

### Gemini 4 Argon

API model: gemini-4-argon. 145 words.

Imagine a massive spreadsheet of 100,000 customer orders sorted by Order Date. If you need to find every order for "Customer X," you have to scan every single row from top to bottom. In a database, this is a slow "full table scan."

A database index solves this. It works like a hidden, second tab in your spreadsheet that lists only Customer Names alphabetically, right next to the exact row numbers where their orders live in the main tab. When you search for "Customer X," the database checks this alphabetical index, grabs the row numbers, and jumps straight to the data instantly. 

However, indexes have a cost: they slow down data entry. Every time you add, delete, or edit an order in your main table, the database must also take time to update and re-sort that hidden index tab, while also using extra storage space.

### GPT 6.1 Sol

API model: gpt-6.1-sol. 114 words.

A database index is a shortcut that helps a database find records without checking every row. Think of it as a searchable guide to a spreadsheet: it stores selected values alongside pointers to the rows containing them.

For example, imagine an orders table with one million rows and columns for order number, customer, and date. To find order #58241 without an index, the database might check rows one by one. An index on the order-number column lets it locate that order much faster.

One cost is slower updates: whenever an order number is added or changed, the database must update both the table and its index. Indexes help searches, but maintaining them adds work.

## Questions

### Does this compare the Gemini and ChatGPT apps?

This page compares the named models through their APIs. It does not test the ChatGPT, Claude, Gemini, or Grok apps, their tools, subscriptions, or system instructions. Model access in Bearly is not a subscription to another company’s app.

### Can I use both models in one app?

Yes. Bearly includes Claude, GPT, Gemini, and Grok. Switch models in a chat, or ask Council of Experts to consult several at once and return their answers plus a summary. Council requires Pro or higher and uses multiple responses.

### Which AI gives the most privacy?

In Bearly, the table shows each model’s current zero-data-retention label from our public catalog. Turn on ZDR-only to keep chat requests on zero-retention models, and turn on end-to-end encryption for new chats. The API requests used for these examples did not run through Bearly’s privacy controls.

### Will I get the same answers?

An answer can change between runs. Different instructions, context, settings, and tools can also change it. The checks below establish only what happened on these specific prompts; they do not establish general accuracy or a model ranking.

## Use both in Bearly

Council of Experts requires Pro or higher and uses multiple responses.

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- [What is Bearly?](https://bearly.ai/product.md)
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- [All guides and pages](https://bearly.ai/llms.txt)