diff --git a/docs/attributes-registry/gen-ai.md b/docs/attributes-registry/gen-ai.md
index c385f71586..2797948696 100644
--- a/docs/attributes-registry/gen-ai.md
+++ b/docs/attributes-registry/gen-ai.md
@@ -83,7 +83,6 @@ Thie group defines attributes for OpenAI.
 | `gen_ai.openai.request.response_format` | string | The response format that is requested.                                | `json`                        | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | `gen_ai.openai.request.seed`            | int    | Requests with same seed value more likely to return same result.      | `100`                         | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | `gen_ai.openai.request.service_tier`    | string | The service tier requested. May be a specific tier, detault, or auto. | `auto`; `default`; `standard` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| `gen_ai.openai.request.top_p`           | double | The top_p sampling setting for the OpenAI request.                    | `1.0`; `0.1`                  | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | `gen_ai.openai.response.service_tier`   | string | The service tier used for the response.                               | `standard`                    | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 
 `gen_ai.openai.request.response_format` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
diff --git a/docs/gen-ai/openai.md b/docs/gen-ai/openai.md
index 6dda3c9840..abc62a9120 100644
--- a/docs/gen-ai/openai.md
+++ b/docs/gen-ai/openai.md
@@ -43,7 +43,6 @@ attributes and ones specific the OpenAI.
 | [`gen_ai.openai.request.response_format`](/docs/attributes-registry/gen-ai.md) | string | The response format that is requested. | `json` | `Conditionally Required` if the request includes a response_format | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.openai.request.seed`](/docs/attributes-registry/gen-ai.md) | int | Requests with same seed value more likely to return same result. | `100` | `Conditionally Required` if the request includes a seed | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.openai.request.service_tier`](/docs/attributes-registry/gen-ai.md) | string | The service tier requested. May be a specific tier, detault, or auto. | `auto`; `default`; `standard` | `Conditionally Required` if the request includes a service_tier | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| [`gen_ai.openai.request.top_p`](/docs/attributes-registry/gen-ai.md) | double | The top_p sampling setting for the OpenAI request. | `1.0`; `0.1` | `Conditionally Required` if the request includes a top_p | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.openai.response.service_tier`](/docs/attributes-registry/gen-ai.md) | string | The service tier used for the response. | `standard` | `Conditionally Required` if the request includes a service_tier | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`server.port`](/docs/attributes-registry/server.md) | int | GenAI server port. [5] | `80`; `8080`; `443` | `Conditionally Required` If `server.address` is set. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
 | [`gen_ai.request.frequency_penalty`](/docs/attributes-registry/gen-ai.md) | double | The frequency penalty setting for the GenAI request. | `0.1` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
@@ -51,7 +50,6 @@ attributes and ones specific the OpenAI.
 | [`gen_ai.request.presence_penalty`](/docs/attributes-registry/gen-ai.md) | double | The presence penalty setting for the GenAI request. | `0.1` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.request.stop_sequences`](/docs/attributes-registry/gen-ai.md) | string[] | List of sequences that the model will use to stop generating further tokens. | `["forest", "lived"]` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.request.temperature`](/docs/attributes-registry/gen-ai.md) | double | The temperature setting for the GenAI request. | `0.0` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
-| [`gen_ai.request.top_k`](/docs/attributes-registry/gen-ai.md) | double | The top_k sampling setting for the GenAI request. | `1.0` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.request.top_p`](/docs/attributes-registry/gen-ai.md) | double | The top_p sampling setting for the GenAI request. | `1.0` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.response.finish_reasons`](/docs/attributes-registry/gen-ai.md) | string[] | Array of reasons the model stopped generating tokens, corresponding to each generation received. | `["stop"]`; `["stop", "length"]` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`gen_ai.response.id`](/docs/attributes-registry/gen-ai.md) | string | The unique identifier for the completion. | `chatcmpl-123` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
diff --git a/model/gen-ai/registry.yaml b/model/gen-ai/registry.yaml
index 26c09dc202..47c632306d 100644
--- a/model/gen-ai/registry.yaml
+++ b/model/gen-ai/registry.yaml
@@ -159,11 +159,6 @@ groups:
         type: int
         brief: Requests with same seed value more likely to return same result.
         examples: [100]
-      - id: gen_ai.openai.request.top_p
-        stability: experimental
-        type: double
-        brief: The top_p sampling setting for the OpenAI request.
-        examples: [1.0, 0.1]
       - id: gen_ai.openai.request.response_format
         stability: experimental
         type:
diff --git a/model/gen-ai/spans.yaml b/model/gen-ai/spans.yaml
index 0953175fdc..c794cddc82 100644
--- a/model/gen-ai/spans.yaml
+++ b/model/gen-ai/spans.yaml
@@ -1,5 +1,5 @@
 groups:
-  - id: trace.gen_ai.client
+  - id: trace.gen_ai.client.common
     type: span
     brief: >
       Describes GenAI operation span.
@@ -20,8 +20,6 @@ groups:
         requirement_level: recommended
       - ref: gen_ai.request.top_p
         requirement_level: recommended
-      - ref: gen_ai.request.top_k
-        requirement_level: recommended
       - ref: gen_ai.request.stop_sequences
         requirement_level: recommended
       - ref: gen_ai.request.frequency_penalty
@@ -86,17 +84,22 @@ groups:
         note: >
           It's RECOMMENDED to format completions as JSON string matching [OpenAI messages format](https://platform.openai.com/docs/guides/text-generation)
 
+  - id: trace.gen_ai.client
+    extends: trace.gen_ai.client.common
+    brief: >
+      Describes a GenAI operation span.
+    attributes:
+      - ref: gen_ai.request.top_k
+        requirement_level: recommended
+
   - id: trace.gen_ai.openai.client
-    extends: trace.gen_ai.client
+    extends: trace.gen_ai.client.common
     brief: >
       Describes an OpenAI operation span.
     attributes:
       - ref: gen_ai.openai.request.seed
         requirement_level:
           conditionally_required: if the request includes a seed
-      - ref: gen_ai.openai.request.top_p
-        requirement_level:
-          conditionally_required: if the request includes a top_p
       - ref: gen_ai.openai.request.response_format
         requirement_level:
           conditionally_required: if the request includes a response_format