---
title: "ChatContentText"
---

Text content part


## Fields

| Field                                                                                                                                                                                                                                                                                                                                       | Type                                                                                                                                                                                                                                                                                                                                        | Required                                                                                                                                                                                                                                                                                                                                    | Description                                                                                                                                                                                                                                                                                                                                 | Example                                                                                                                                                                                                                                                                                                                                     |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `cache_control`                                                                                                                                                                                                                                                                                                                             | [Optional[components.ChatContentCacheControl]](../components/chatcontentcachecontrol.mdx)                                                                                                                                                                                                                                                    | :heavy_minus_sign:                                                                                                                                                                                                                                                                                                                          | Anthropic-style cache breakpoint for the content part. Interchangeable with the OpenAI-style `prompt_cache_breakpoint` marker: OpenRouter converts between the two based on the provider serving the request.                                                                                                                               | \{<br/>"ttl": "5m",<br/>"type": "ephemeral"<br/>}                                                                                                                                                                                                                                                                                            |
| `prompt_cache_breakpoint`                                                                                                                                                                                                                                                                                                                   | [OptionalNullable[components.PromptCacheBreakpoint]](../components/promptcachebreakpoint.mdx)                                                                                                                                                                                                                                                | :heavy_minus_sign:                                                                                                                                                                                                                                                                                                                          | Marks an explicit prompt-cache boundary on this content block (OpenAI-style). Everything through the block carrying this marker is part of the candidate cached prefix. Supported natively by OpenAI GPT-5.6 and newer; on providers that use Anthropic-style `cache_control`, OpenRouter converts the marker to that format automatically. | \{<br/>"mode": "explicit"<br/>}                                                                                                                                                                                                                                                                                                              |
| `text`                                                                                                                                                                                                                                                                                                                                      | *str*                                                                                                                                                                                                                                                                                                                                       | :heavy_check_mark:                                                                                                                                                                                                                                                                                                                          | N/A                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                             |
| `type`                                                                                                                                                                                                                                                                                                                                      | [components.ChatContentTextType](../components/chatcontenttexttype.mdx)                                                                                                                                                                                                                                                                      | :heavy_check_mark:                                                                                                                                                                                                                                                                                                                          | N/A                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                             |