diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md
index ae53e3c60b..3a84296aa5 100644
--- a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md
@@ -8,7 +8,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 - Fix `AttributeError` when handling `LegacyAPIResponse` (from `with_raw_response`)
-  ([#4002](https://github.com/open-telemetry/opentelemetry-python-contrib/issues/4002))
+  ([#4017](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4017))
+- Add support for chat completions choice count and stop sequences span attributes
+  ([#4028](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4028))
 
 ## Version 2.2b0 (2025-11-25)
 
diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py
index 4b58759e22..7a0ef158a6 100644
--- a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py
@@ -194,6 +194,8 @@ def get_llm_request_attributes(
     client_instance,
     operation_name=GenAIAttributes.GenAiOperationNameValues.CHAT.value,
 ):
+    # pylint: disable=too-many-branches
+
     attributes = {
         GenAIAttributes.GEN_AI_OPERATION_NAME: operation_name,
         GenAIAttributes.GEN_AI_SYSTEM: GenAIAttributes.GenAiSystemValues.OPENAI.value,
@@ -222,6 +224,20 @@ def get_llm_request_attributes(
             }
         )
 
+        if (choice_count := kwargs.get("n")) is not None:
+            # Only add non default, meaningful values
+            if isinstance(choice_count, int) and choice_count != 1:
+                attributes[GenAIAttributes.GEN_AI_REQUEST_CHOICE_COUNT] = (
+                    choice_count
+                )
+
+        if (stop_sequences := kwargs.get("stop")) is not None:
+            if isinstance(stop_sequences, str):
+                stop_sequences = [stop_sequences]
+            attributes[GenAIAttributes.GEN_AI_REQUEST_STOP_SEQUENCES] = (
+                stop_sequences
+            )
+
         if (response_format := kwargs.get("response_format")) is not None:
             # response_format may be string or object with a string in the `type` key
             if isinstance(response_format, Mapping):
diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/cassettes/test_chat_completion_handle_stop_sequences_as_string.yaml b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/cassettes/test_chat_completion_handle_stop_sequences_as_string.yaml
new file mode 100644
index 0000000000..27a7866e4d
--- /dev/null
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/cassettes/test_chat_completion_handle_stop_sequences_as_string.yaml
@@ -0,0 +1,144 @@
+interactions:
+- request:
+    body: |-
+      {
+        "messages": [
+          {
+            "role": "user",
+            "content": "Say this is a test"
+          }
+        ],
+        "model": "gpt-4o-mini",
+        "stop": "stop"
+      }
+    headers:
+      Accept:
+      - application/json
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '105'
+      Content-Type:
+      - application/json
+      Host:
+      - api.openai.com
+      User-Agent:
+      - OpenAI/Python 1.109.1
+      X-Stainless-Arch:
+      - x64
+      X-Stainless-Async:
+      - 'false'
+      X-Stainless-Lang:
+      - python
+      X-Stainless-OS:
+      - Linux
+      X-Stainless-Package-Version:
+      - 1.109.1
+      X-Stainless-Runtime:
+      - CPython
+      X-Stainless-Runtime-Version:
+      - 3.12.12
+      authorization:
+      - Bearer test_openai_api_key
+      x-stainless-read-timeout:
+      - '600'
+      x-stainless-retry-count:
+      - '0'
+    method: POST
+    uri: https://api.openai.com/v1/chat/completions
+  response:
+    body:
+      string: |-
+        {
+          "id": "chatcmpl-Clubs1bbZwGUeDKpnPUWDMEhSbquh",
+          "object": "chat.completion",
+          "created": 1765535060,
+          "model": "gpt-4o-mini-2024-07-18",
+          "choices": [
+            {
+              "index": 0,
+              "message": {
+                "role": "assistant",
+                "content": "This is a test. How can I assist you further?",
+                "refusal": null,
+                "annotations": []
+              },
+              "logprobs": null,
+              "finish_reason": "stop"
+            }
+          ],
+          "usage": {
+            "prompt_tokens": 12,
+            "completion_tokens": 12,
+            "total_tokens": 24,
+            "prompt_tokens_details": {
+              "cached_tokens": 0,
+              "audio_tokens": 0
+            },
+            "completion_tokens_details": {
+              "reasoning_tokens": 0,
+              "audio_tokens": 0,
+              "accepted_prediction_tokens": 0,
+              "rejected_prediction_tokens": 0
+            }
+          },
+          "service_tier": "default",
+          "system_fingerprint": "fp_11f3029f6b"
+        }
+    headers:
+      CF-RAY:
+      - 9acc82e96fde4bf3-MXP
+      Connection:
+      - keep-alive
+      Content-Type:
+      - application/json
+      Date:
+      - Fri, 12 Dec 2025 10:24:20 GMT
+      Server:
+      - cloudflare
+      Set-Cookie: test_set_cookie
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      Transfer-Encoding:
+      - chunked
+      X-Content-Type-Options:
+      - nosniff
+      access-control-expose-headers:
+      - X-Request-ID
+      alt-svc:
+      - h3=":443"; ma=86400
+      cf-cache-status:
+      - DYNAMIC
+      content-length:
+      - '852'
+      openai-organization: test_openai_org_id
+      openai-processing-ms:
+      - '500'
+      openai-project:
+      - proj_Pf1eM5R55Z35wBy4rt8PxAGq
+      openai-version:
+      - '2020-10-01'
+      x-envoy-upstream-service-time:
+      - '826'
+      x-openai-proxy-wasm:
+      - v0.1
+      x-ratelimit-limit-requests:
+      - '10000'
+      x-ratelimit-limit-tokens:
+      - '10000000'
+      x-ratelimit-remaining-requests:
+      - '9999'
+      x-ratelimit-remaining-tokens:
+      - '9999993'
+      x-ratelimit-reset-requests:
+      - 6ms
+      x-ratelimit-reset-tokens:
+      - 0s
+      x-request-id:
+      - req_993163a7581641b7b9aee6e03ef4ca3a
+    status:
+      code: 200
+      message: OK
+version: 1
diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/cassettes/test_chat_completion_n_1_is_not_reported.yaml b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/cassettes/test_chat_completion_n_1_is_not_reported.yaml
new file mode 100644
index 0000000000..2cc137f4b3
--- /dev/null
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/cassettes/test_chat_completion_n_1_is_not_reported.yaml
@@ -0,0 +1,144 @@
+interactions:
+- request:
+    body: |-
+      {
+        "messages": [
+          {
+            "role": "user",
+            "content": "Say this is a test"
+          }
+        ],
+        "model": "gpt-4o-mini",
+        "n": 1
+      }
+    headers:
+      Accept:
+      - application/json
+      Accept-Encoding:
+      - gzip, deflate
+      Connection:
+      - keep-alive
+      Content-Length:
+      - '97'
+      Content-Type:
+      - application/json
+      Host:
+      - api.openai.com
+      User-Agent:
+      - OpenAI/Python 1.109.1
+      X-Stainless-Arch:
+      - x64
+      X-Stainless-Async:
+      - 'false'
+      X-Stainless-Lang:
+      - python
+      X-Stainless-OS:
+      - Linux
+      X-Stainless-Package-Version:
+      - 1.109.1
+      X-Stainless-Runtime:
+      - CPython
+      X-Stainless-Runtime-Version:
+      - 3.12.12
+      authorization:
+      - Bearer test_openai_api_key
+      x-stainless-read-timeout:
+      - '600'
+      x-stainless-retry-count:
+      - '0'
+    method: POST
+    uri: https://api.openai.com/v1/chat/completions
+  response:
+    body:
+      string: |-
+        {
+          "id": "chatcmpl-ClubqNLub25QPdqxjOslny04PLCYZ",
+          "object": "chat.completion",
+          "created": 1765535058,
+          "model": "gpt-4o-mini-2024-07-18",
+          "choices": [
+            {
+              "index": 0,
+              "message": {
+                "role": "assistant",
+                "content": "This is a test. How can I assist you today?",
+                "refusal": null,
+                "annotations": []
+              },
+              "logprobs": null,
+              "finish_reason": "stop"
+            }
+          ],
+          "usage": {
+            "prompt_tokens": 12,
+            "completion_tokens": 12,
+            "total_tokens": 24,
+            "prompt_tokens_details": {
+              "cached_tokens": 0,
+              "audio_tokens": 0
+            },
+            "completion_tokens_details": {
+              "reasoning_tokens": 0,
+              "audio_tokens": 0,
+              "accepted_prediction_tokens": 0,
+              "rejected_prediction_tokens": 0
+            }
+          },
+          "service_tier": "default",
+          "system_fingerprint": "fp_11f3029f6b"
+        }
+    headers:
+      CF-RAY:
+      - 9acc82ddddd4edba-MXP
+      Connection:
+      - keep-alive
+      Content-Type:
+      - application/json
+      Date:
+      - Fri, 12 Dec 2025 10:24:19 GMT
+      Server:
+      - cloudflare
+      Set-Cookie: test_set_cookie
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      Transfer-Encoding:
+      - chunked
+      X-Content-Type-Options:
+      - nosniff
+      access-control-expose-headers:
+      - X-Request-ID
+      alt-svc:
+      - h3=":443"; ma=86400
+      cf-cache-status:
+      - DYNAMIC
+      content-length:
+      - '850'
+      openai-organization: test_openai_org_id
+      openai-processing-ms:
+      - '405'
+      openai-project:
+      - proj_Pf1eM5R55Z35wBy4rt8PxAGq
+      openai-version:
+      - '2020-10-01'
+      x-envoy-upstream-service-time:
+      - '529'
+      x-openai-proxy-wasm:
+      - v0.1
+      x-ratelimit-limit-requests:
+      - '10000'
+      x-ratelimit-limit-tokens:
+      - '10000000'
+      x-ratelimit-remaining-requests:
+      - '9999'
+      x-ratelimit-remaining-tokens:
+      - '9999993'
+      x-ratelimit-reset-requests:
+      - 6ms
+      x-ratelimit-reset-tokens:
+      - 0s
+      x-request-id:
+      - req_2b15771f24a4465fb5fc43b797f39e04
+    status:
+      code: 200
+      message: OK
+version: 1
diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/test_chat_completions.py b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/test_chat_completions.py
index 36eec591df..2ab4b9977f 100644
--- a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/test_chat_completions.py
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/tests/test_chat_completions.py
@@ -11,7 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-# pylint: disable=too-many-locals
+
+# pylint: disable=too-many-locals,too-many-lines
 
 import logging
 
@@ -252,6 +253,7 @@ def test_chat_completion_extra_params(
     messages_value = [{"role": "user", "content": "Say this is a test"}]
 
     response = openai_client.chat.completions.create(
+        n=2,
         messages=messages_value,
         model=llm_model_value,
         seed=42,
@@ -260,6 +262,7 @@ def test_chat_completion_extra_params(
         stream=False,
         extra_body={"service_tier": "default"},
         response_format={"type": "text"},
+        stop=["full", "stop"],
     )
 
     spans = span_exporter.get_finished_spans()
@@ -290,6 +293,68 @@ def test_chat_completion_extra_params(
         ]
         == "text"
     )
+    assert spans[0].attributes[
+        GenAIAttributes.GEN_AI_REQUEST_STOP_SEQUENCES
+    ] == ("full", "stop")
+    assert (
+        spans[0].attributes[GenAIAttributes.GEN_AI_REQUEST_CHOICE_COUNT] == 2
+    )
+
+
+@pytest.mark.vcr()
+def test_chat_completion_n_1_is_not_reported(
+    span_exporter, openai_client, instrument_no_content
+):
+    llm_model_value = "gpt-4o-mini"
+    messages_value = [{"role": "user", "content": "Say this is a test"}]
+
+    response = openai_client.chat.completions.create(
+        n=1,
+        messages=messages_value,
+        model=llm_model_value,
+    )
+
+    spans = span_exporter.get_finished_spans()
+    assert_all_attributes(
+        spans[0],
+        llm_model_value,
+        response.id,
+        response.model,
+        response.usage.prompt_tokens,
+        response.usage.completion_tokens,
+        response_service_tier=getattr(response, "service_tier", None),
+    )
+    assert (
+        GenAIAttributes.GEN_AI_REQUEST_CHOICE_COUNT not in spans[0].attributes
+    )
+
+
+@pytest.mark.vcr()
+def test_chat_completion_handle_stop_sequences_as_string(
+    span_exporter, openai_client, instrument_no_content
+):
+    llm_model_value = "gpt-4o-mini"
+    messages_value = [{"role": "user", "content": "Say this is a test"}]
+
+    response = openai_client.chat.completions.create(
+        messages=messages_value,
+        model=llm_model_value,
+        stop="stop",
+    )
+
+    spans = span_exporter.get_finished_spans()
+    assert_all_attributes(
+        spans[0],
+        llm_model_value,
+        response.id,
+        response.model,
+        response.usage.prompt_tokens,
+        response.usage.completion_tokens,
+        response_service_tier=getattr(response, "service_tier", None),
+    )
+    assert spans[0].attributes[
+        GenAIAttributes.GEN_AI_REQUEST_STOP_SEQUENCES
+    ] == ("stop",)
 
 
 @pytest.mark.vcr()
@@ -313,6 +378,10 @@ def test_chat_completion_multiple_choices(
         response.usage.completion_tokens,
     )
 
+    assert (
+        spans[0].attributes[GenAIAttributes.GEN_AI_REQUEST_CHOICE_COUNT] == 2
+    )
+
     logs = log_exporter.get_finished_logs()
     assert len(logs) == 3  # 1 user message + 2 choice messages