diff --git a/agentops/instrumentation/common/token_counting.py b/agentops/instrumentation/common/token_counting.py
index 7d2f19f07..dd5b676dd 100644
--- a/agentops/instrumentation/common/token_counting.py
+++ b/agentops/instrumentation/common/token_counting.py
@@ -32,9 +32,12 @@ def to_attributes(self) -> Dict[str, int]:
 
         if self.prompt_tokens:
             attributes[SpanAttributes.LLM_USAGE_PROMPT_TOKENS] = self.prompt_tokens
+            # Dual-emit current OTel GenAI names so mixed-SDK collectors can sum either family.
+            attributes[SpanAttributes.LLM_USAGE_INPUT_TOKENS] = self.prompt_tokens
 
         if self.completion_tokens:
             attributes[SpanAttributes.LLM_USAGE_COMPLETION_TOKENS] = self.completion_tokens
+            attributes[SpanAttributes.LLM_USAGE_OUTPUT_TOKENS] = self.completion_tokens
 
         if self.total_tokens:
             attributes[SpanAttributes.LLM_USAGE_TOTAL_TOKENS] = self.total_tokens
diff --git a/agentops/semconv/span_attributes.py b/agentops/semconv/span_attributes.py
index 2c5f8ce1c..255980008 100644
--- a/agentops/semconv/span_attributes.py
+++ b/agentops/semconv/span_attributes.py
@@ -58,8 +58,12 @@ class SpanAttributes:
     LLM_RESPONSE_ID = "gen_ai.response.id"
 
     # Usage metrics
+    # Legacy GenAI names still emitted by AgentOps; current OTel GenAI names are
+    # dual-emitted during the transition (#1447).
     LLM_USAGE_COMPLETION_TOKENS = "gen_ai.usage.completion_tokens"
     LLM_USAGE_PROMPT_TOKENS = "gen_ai.usage.prompt_tokens"
+    LLM_USAGE_INPUT_TOKENS = "gen_ai.usage.input_tokens"
+    LLM_USAGE_OUTPUT_TOKENS = "gen_ai.usage.output_tokens"
     LLM_USAGE_TOTAL_TOKENS = "gen_ai.usage.total_tokens"
     LLM_USAGE_CACHE_CREATION_INPUT_TOKENS = "gen_ai.usage.cache_creation_input_tokens"
     LLM_USAGE_CACHE_READ_INPUT_TOKENS = "gen_ai.usage.cache_read_input_tokens"
diff --git a/tests/unit/instrumentation/common/test_token_counting.py b/tests/unit/instrumentation/common/test_token_counting.py
index 2f00561b9..2e5e28253 100644
--- a/tests/unit/instrumentation/common/test_token_counting.py
+++ b/tests/unit/instrumentation/common/test_token_counting.py
@@ -21,6 +21,18 @@ def test_includes_positive_values_only(self):
         attrs = usage.to_attributes()
         assert SpanAttributes.LLM_USAGE_PROMPT_TOKENS in attrs
         assert attrs[SpanAttributes.LLM_USAGE_PROMPT_TOKENS] == 5
+        assert SpanAttributes.LLM_USAGE_INPUT_TOKENS in attrs
+        assert attrs[SpanAttributes.LLM_USAGE_INPUT_TOKENS] == 5
         assert SpanAttributes.LLM_USAGE_COMPLETION_TOKENS not in attrs
+        assert SpanAttributes.LLM_USAGE_OUTPUT_TOKENS not in attrs
         assert SpanAttributes.LLM_USAGE_TOTAL_TOKENS in attrs
         assert attrs[SpanAttributes.LLM_USAGE_TOTAL_TOKENS] == 5
+
+    def test_dual_emits_current_otel_genai_names(self):
+        usage = TokenUsage(prompt_tokens=10, completion_tokens=4, total_tokens=14)
+        attrs = usage.to_attributes()
+        assert attrs[SpanAttributes.LLM_USAGE_PROMPT_TOKENS] == 10
+        assert attrs[SpanAttributes.LLM_USAGE_INPUT_TOKENS] == 10
+        assert attrs[SpanAttributes.LLM_USAGE_COMPLETION_TOKENS] == 4
+        assert attrs[SpanAttributes.LLM_USAGE_OUTPUT_TOKENS] == 4
+        assert attrs[SpanAttributes.LLM_USAGE_TOTAL_TOKENS] == 14