Title: PromptBuilder::usingModel
Published: May 20, 2026

---

# PromptBuilder::usingModel( WordPressAiClientProvidersModelsContractsModelInterface $model ): self

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#description)
 * [Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#wp--skip-link--target)

Sets the model to use for generation.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#description)󠁿

The model’s configuration will be merged with the builder’s configuration, with 
the builder’s configuration taking precedence for any overlapping settings.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#parameters)󠁿

 `$model`WordPressAiClientProvidersModelsContractsModelInterfacerequired

The model to use.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#return)󠁿

 self

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#source)󠁿

    ```php
    public function usingModel(ModelInterface $model): self
    {
        $this->model = $model;
        // Merge model's config with builder's config, with builder's config taking precedence
        $modelConfigArray = $model->getConfig()->toArray();
        $builderConfigArray = $this->modelConfig->toArray();
        $mergedConfigArray = array_merge($modelConfigArray, $builderConfigArray);
        $this->modelConfig = ModelConfig::fromArray($mergedConfigArray);
        return $this;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/builders/promptbuilder.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Builders/PromptBuilder.php#L233)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Builders/PromptBuilder.php#L233-L242)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#related)󠁿

| Uses | Description | 
| [ModelConfig::fromArray()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-models-dto-modelconfig/fromarray/)`wp-includes/php-ai-client/src/Providers/Models/DTO/ModelConfig.php` |

{@inheritDoc}

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/usingmodel/?output_format=md#changelog)󠁿

| Version | Description | 
| [0.1.0](https://developer.wordpress.org/reference/since/0.1.0/) | Introduced. |

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