Merge pull request #2525 from mrbullwinkle/mrb_01_27_2025_update

[Azure OpenAI] Prompt caching update

Author: prmerger-automator[bot]

articles/ai-services/openai/how-to/prompt-caching.md

@@ -75,16 +75,16 @@ A single character difference in the first 1,024 tokens will result in a cache m
 
 ## What is cached?
 
-The o1-series models are text only and don't support system messages, images, tool use/function calling, or structured outputs. This limits the efficacy of prompt caching for these models to the user/assistant portions of the messages array which are less likely to have an identical 1024 token prefix.
+o1-series models feature support varies by model. For more details, see our dedicated [reasoning models guide](./reasoning.md). 
 
 Prompt caching is supported for:
 
 |**Caching supported**|**Description**|**Supported models**|
 |--------|--------|--------|
-| **Messages** | The complete messages array: system, user, and assistant content | `gpt-4o`<br/>`gpt-4o-mini`<br/>`gpt-4o-realtime-preview` (version 2024-12-17) |
-| **Images** | Images included in user messages, both as links or as base64-encoded data. The detail parameter must be set the same across requests. | `gpt-4o`<br/>`gpt-4o-mini` |
-| **Tool use** | Both the messages array and tool definitions. | `gpt-4o`<br/>`gpt-4o-mini`<br/>`gpt-4o-realtime-preview` (version 2024-12-17) |
-| **Structured outputs** | Structured output schema is appended as a prefix to the system message. | `gpt-4o`<br/>`gpt-4o-mini` |
+| **Messages** | The complete messages array: system, developer, user, and assistant content | `gpt-4o`<br/>`gpt-4o-mini`<br/>`gpt-4o-realtime-preview` (version 2024-12-17) <br> `o1` (version 2024-12-17) |
+| **Images** | Images included in user messages, both as links or as base64-encoded data. The detail parameter must be set the same across requests. | `gpt-4o`<br/>`gpt-4o-mini` <br> `o1` (version 2024-12-17)  |
+| **Tool use** | Both the messages array and tool definitions. | `gpt-4o`<br/>`gpt-4o-mini`<br/>`gpt-4o-realtime-preview` (version 2024-12-17) <br> `o1` (version 2024-12-17) |
+| **Structured outputs** | Structured output schema is appended as a prefix to the system message. | `gpt-4o`<br/>`gpt-4o-mini` <br> `o1` (version 2024-12-17) |
 
 To improve the likelihood of cache hits occurring, you should structure your requests such that repetitive content occurs at the beginning of the messages array.