AI Client lacks filters for customizing model selection and generation parameters

[raftaar1191]

The AI Client in WordPress 7.0 provides very limited filtering capabilities for third-party plugin customization.

Existing Filters

Currently, only two filters exist:

• wp_ai_client_default_request_timeout (HTTP timeout only)
• wp_ai_client_prevent_prompt (request abort only)

Current Limitations

There is currently no way for third-party plugins to customize:

• Model selection per-capability (text generation, image generation, vision)
• Generation parameters:
  • temperature
  • max_tokens
  • top_p
  • top_k
  • presence_penalty
  • frequency_penalty
• The PSR-14 BeforeGenerateResultEvent is read-only and cannot modify parameters

Impact

This severely limits the ability of plugin developers to build AI-powered features with custom behavior and control. Plugin developers cannot:

• Dynamically select different models based on context or user role
• Adjust temperature for deterministic vs. creative output
• Control token limits per-capability or per-context
• Set request timeouts per-capability
• Conditionally modify generation parameters based on post type, user subscription, or other factors

Why This Matters

Without these hooks, developers are forced to use workarounds and cannot leverage standard WordPress filter conventions for AI Client customization. This limits the extensibility of the AI Client and prevents a rich ecosystem of AI-powered plugins from being built.

[takshil]

related: https://core.trac.wordpress.org/ticket/65097

[audrasjb]

Removing trunk version as this is not going to be shipped with WP 7.0 but in the next releases.

[desrosj]

Since this is an enhancement, there's no first version of WordPress this can be reproduced in. Removing trunk version.

[gziolo]

@jason_the_adams, how do you see fit here? It isn't milestoned for WordPress 7.1, nor was it covered in ​​https://make.wordpress.org/ai/2026/06/19/whats-coming-to-the-ai-client-in-wp-7-1/, so I'd like to get clarifications to triage it properly.