> ## Documentation Index
> Fetch the complete documentation index at: https://nixtla.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart (TimeGPT-1)

> Learn how to use TimeGPT for accurate time series forecasting

## TimeGPT-1 Family - Foundation Models for Time Series Forecasting

TimeGPT is a production-ready generative pretrained transformer for time series forecasting and predictions. It delivers accurate forecasts for retail sales, electricity demand, financial markets, and IoT sensor data with just a few lines of Python code. This quickstart guide will have you making your first forecast in under 5 minutes!

## Set Up TimeGPT for Python Time Series Forecasting

### Step 1: Get an API Key

* Visit [dashboard](https://nixtla.io/free-trial?utm_source=nixtla.io\&utm_campaign=/docs/forecasting/timegpt_quickstart) to activate your free trial and create an account.
  * Sign in using Google, GitHub, or your email.
  * Navigate to **API Keys** in the menu and select **Create New API Key**.
  * Your new API key will appear on the screen. Copy this key and save it in a safe place for use later.

<Frame caption="TimeGPT dashboard showing API key management interface for Python forecasting">
  ![Dashboard for TimeGPT API keys](https://github.com/Nixtla/nixtla/blob/main/nbs/img/dashboard.png?raw=true)
</Frame>

### Step 2: Install Nixtla

Install the Nixtla library in your preferred Python environment:

```bash theme={null}
pip install nixtla
```

### Step 3: Import the Nixtla TimeGPT client

Import the Nixtla client and instantiate it with your API key:

```python theme={null}
from nixtla import NixtlaClient

nixtla_client = NixtlaClient(
    api_key='my_api_key_provided_by_nixtla'
)
```

### Step 4: Verify your API key

Verify the status and validity of your API key:

```python theme={null}
nixtla_client.validate_api_key()
```

```bash theme={null}
True
```

<Info>
  For enhanced security practices, see our guide on
  [Setting Up your API Key](/setup/setting_up_your_api_key).
</Info>

## Make Your First Time Series Forecast

We'll demonstrate TimeGPT's forecasting capabilities using the classic `AirPassengers` dataset, a monthly time series showing international airline passengers from 1949 to 1960.

```python theme={null}
import pandas as pd

df = pd.read_csv('https://raw.githubusercontent.com/Nixtla/transfer-learning-time-series/main/datasets/air_passengers.csv')
df.head()
```

|   | timestamp  | value |
| - | ---------- | ----- |
| 0 | 1949-01-01 | 112   |
| 1 | 1949-02-01 | 118   |
| 2 | 1949-03-01 | 132   |
| 3 | 1949-04-01 | 129   |
| 4 | 1949-05-01 | 121   |

<Info>
  If you are using your own data, here are the data requirements:

  * The target variable must not contain missing or non-numeric values.
  * The timestamp column must not contain missing values.
  * Date stamps must form a continuous sequence without gaps for the selected frequency.
  * pandas must be able to parse the timestamp column as datetime objects. ([see Pandas documentation](https://pandas.pydata.org/docs/reference/api/pandas.to_datetime.html)).

  For more details, visit [Data Requirements](/data_requirements/data_requirements).
</Info>

Plot the dataset:

```python theme={null}
nixtla_client.plot(df, time_col='timestamp', target_col='value')
```

<Frame caption="Historical AirPassengers time series data visualization showing monthly passenger trends from 1949 to 1960">
  ![Time Series Plot](https://raw.githubusercontent.com/Nixtla/nixtla/readme_docs/nbs/_docs/docs/getting-started/2_quickstart_files/figure-markdown_strict/cell-13-output-1.png)
</Frame>

The `plot` method automatically displays figures in notebook environments. To save a plot locally:

```python theme={null}
fig = nixtla_client.plot(df, time_col='timestamp', target_col='value')
fig.savefig('plot.png', bbox_inches='tight')
```

## Real-World Forecasting Applications

TimeGPT excels at:

* **Retail forecasting**: Predict product demand and inventory needs
* **Energy forecasting**: Forecast electricity consumption and renewable energy production
* **Financial forecasting**: Project revenue, sales, and market trends
* **IoT predictions**: Anticipate sensor readings and equipment metrics

## Short and Long-Term Forecasting Examples

### Generate a longer-term forecast

Forecast the next 12 months using the SDK's `forecast` method:

```python theme={null}
timegpt_fcst_df = nixtla_client.forecast(
    df=df,
    h=12,
    freq='MS',
    time_col='timestamp',
    target_col='value'
)
timegpt_fcst_df.head()
```

Plot the forecast:

```python theme={null}
nixtla_client.plot(df, timegpt_fcst_df, time_col='timestamp', target_col='value')
```

<Frame caption="TimeGPT 12-month forecast visualization with confidence intervals for AirPassengers dataset">
  ![Forecasted Plot](https://raw.githubusercontent.com/Nixtla/nixtla/readme_docs/nbs/_docs/docs/getting-started/2_quickstart_files/figure-markdown_strict/cell-15-output-1.png)
</Frame>

You may also generate forecasts for longer horizons with the `timegpt-1-long-horizon` model. For example, 36 months ahead:

```python theme={null}
timegpt_fcst_df = nixtla_client.forecast(
    df=df,
    h=36,
    freq='MS',
    time_col='timestamp',
    target_col='value',
    model='timegpt-1-long-horizon'
)
timegpt_fcst_df.head()
```

Plot the forecast:

```python theme={null}
nixtla_client.plot(df, timegpt_fcst_df, time_col='timestamp', target_col='value')
```

<Frame caption="TimeGPT long-horizon model 36-month forecast with extended prediction intervals">
  ![Longer Forecast Plot](https://raw.githubusercontent.com/Nixtla/nixtla/readme_docs/nbs/_docs/docs/getting-started/2_quickstart_files/figure-markdown_strict/cell-17-output-1.png)
</Frame>

### Generate a shorter-term forecast

Forecast the next 6 months with a single command:

```python theme={null}
timegpt_fcst_df = nixtla_client.forecast(
    df=df,
    h=6,
    freq='MS',
    time_col='timestamp',
    target_col='value'
)
```

Plot the forecast:

```python theme={null}
nixtla_client.plot(df, timegpt_fcst_df, time_col='timestamp', target_col='value')
```

<Frame caption="TimeGPT 6-month short-term forecast for AirPassengers with prediction confidence bands">
  ![Shorter Forecast Plot](https://raw.githubusercontent.com/Nixtla/nixtla/readme_docs/nbs/_docs/docs/getting-started/2_quickstart_files/figure-markdown_strict/cell-18-output-2.png)
</Frame>

## Frequently Asked Questions

### How accurate is TimeGPT for forecasting?

TimeGPT achieves state-of-the-art accuracy across multiple domains including retail, finance, and electricity forecasting with zero-shot learning.

### Can I use TimeGPT with my own time series data?

Yes, TimeGPT works with any time series data in pandas DataFrame format with a timestamp and target value column.

### How long does it take to generate forecasts?

TimeGPT typically generates forecasts in seconds, making it suitable for production environments.

## Next Steps

Now that you've made your first forecast, explore these tutorials to unlock TimeGPT's full capabilities:

* [Improve Accuracy](/forecasting/improve_accuracy) - Advanced techniques to enhance forecast accuracy
* [Fine-Tuning](/forecasting/fine-tuning/steps) - Customize TimeGPT for your specific data
* [Exogenous Variables](/forecasting/exogenous-variables/numeric_features) - Include external variables in forecasts
* [Uncertainty Quantification](/forecasting/probabilistic/introduction) - Generate prediction intervals and quantile forecasts
* [Cross-Validation](/forecasting/evaluation/cross_validation) - Assess forecast performance
* [Forecasting at Scale](/forecasting/forecasting-at-scale/computing_at_scale) - Process thousands of time series
* [Anomaly Detection](/anomaly_detection/historical_anomaly_detection) - Identify outliers in your data