diff --git a/packages/junior/src/chat/logging.ts b/packages/junior/src/chat/logging.ts
index 040e0277..93659ba7 100644
--- a/packages/junior/src/chat/logging.ts
+++ b/packages/junior/src/chat/logging.ts
@@ -1835,8 +1835,9 @@ export function extractGenAiUsageAttributes(
   Record<
     | "gen_ai.usage.input_tokens"
     | "gen_ai.usage.output_tokens"
-    | "gen_ai.usage.cache_read.input_tokens"
-    | "gen_ai.usage.cache_creation.input_tokens",
+    | "gen_ai.usage.total_tokens"
+    | "gen_ai.usage.input_tokens.cached"
+    | "gen_ai.usage.input_tokens.cache_write",
     number
   >
 > {
@@ -1847,6 +1848,7 @@ export function extractGenAiUsageAttributes(
     cachedInputTokens,
     cacheCreationTokens,
   );
+  const totalTokens = sumTokenCounts(semanticInputTokens, outputTokens);
 
   return {
     ...(semanticInputTokens !== undefined
@@ -1855,11 +1857,14 @@ export function extractGenAiUsageAttributes(
     ...(outputTokens !== undefined
       ? { "gen_ai.usage.output_tokens": outputTokens }
       : {}),
+    ...(totalTokens !== undefined
+      ? { "gen_ai.usage.total_tokens": totalTokens }
+      : {}),
     ...(cachedInputTokens !== undefined
-      ? { "gen_ai.usage.cache_read.input_tokens": cachedInputTokens }
+      ? { "gen_ai.usage.input_tokens.cached": cachedInputTokens }
       : {}),
     ...(cacheCreationTokens !== undefined
-      ? { "gen_ai.usage.cache_creation.input_tokens": cacheCreationTokens }
+      ? { "gen_ai.usage.input_tokens.cache_write": cacheCreationTokens }
       : {}),
   };
 }
diff --git a/packages/junior/tests/unit/logging/extract-gen-ai-usage-summary.test.ts b/packages/junior/tests/unit/logging/extract-gen-ai-usage-summary.test.ts
index ab9d7c3c..8081c6f3 100644
--- a/packages/junior/tests/unit/logging/extract-gen-ai-usage-summary.test.ts
+++ b/packages/junior/tests/unit/logging/extract-gen-ai-usage-summary.test.ts
@@ -100,7 +100,7 @@ describe("extractGenAiUsageSummary", () => {
     });
   });
 
-  it("maps cache token counters to current GenAI semantic attributes", () => {
+  it("maps cache token counters to Sentry convention attribute names", () => {
     expect(
       extractGenAiUsageAttributes({
         inputTokens: 10,
@@ -111,8 +111,9 @@ describe("extractGenAiUsageSummary", () => {
     ).toEqual({
       "gen_ai.usage.input_tokens": 15,
       "gen_ai.usage.output_tokens": 2,
-      "gen_ai.usage.cache_read.input_tokens": 4,
-      "gen_ai.usage.cache_creation.input_tokens": 1,
+      "gen_ai.usage.total_tokens": 17,
+      "gen_ai.usage.input_tokens.cached": 4,
+      "gen_ai.usage.input_tokens.cache_write": 1,
     });
   });
 });
diff --git a/specs/logging/semantics.md b/specs/logging/semantics.md
index 916f0e57..02825f38 100644
--- a/specs/logging/semantics.md
+++ b/specs/logging/semantics.md
@@ -79,8 +79,9 @@ This file is the canonical attribute and naming map for instrumentation in this
 - `gen_ai.output.messages` (when captured)
 - `gen_ai.usage.input_tokens` (when available)
 - `gen_ai.usage.output_tokens` (when available)
-- `gen_ai.usage.cache_read.input_tokens` (when available)
-- `gen_ai.usage.cache_creation.input_tokens` (when available)
+- `gen_ai.usage.total_tokens` (when available)
+- `gen_ai.usage.input_tokens.cached` (when available; Sentry convention)
+- `gen_ai.usage.input_tokens.cache_write` (when available; Sentry convention)
 - `gen_ai.tool.description` (when available)
 - `gen_ai.tool.name` (for `execute_tool`)
 - `gen_ai.tool.call.id` (when available)
diff --git a/specs/logging/tracing-spec.md b/specs/logging/tracing-spec.md
index 93430aef..a14dd9fc 100644
--- a/specs/logging/tracing-spec.md
+++ b/specs/logging/tracing-spec.md
@@ -77,8 +77,8 @@ Define the canonical tracing contract for span naming, boundaries, attributes, a
 - `gen_ai.response.finish_reasons` when available from provider responses.
 - `gen_ai.system_instructions` when provided separately from chat history and safely captured.
 - `gen_ai.input.messages` / `gen_ai.output.messages` when safely captured.
-- `gen_ai.usage.input_tokens` / `gen_ai.usage.output_tokens` when available from provider responses.
-- `gen_ai.usage.cache_read.input_tokens` / `gen_ai.usage.cache_creation.input_tokens` when available from provider responses.
+- `gen_ai.usage.input_tokens` / `gen_ai.usage.output_tokens` / `gen_ai.usage.total_tokens` when available from provider responses.
+- `gen_ai.usage.input_tokens.cached` / `gen_ai.usage.input_tokens.cache_write` when available from provider responses (Sentry convention names; required for AI Monitoring UI visibility).
 - `gen_ai.tool.description` when available on tool execution spans.
 - `gen_ai.tool.call.arguments` / `gen_ai.tool.call.result` on tool execution spans when captured.
 - Keep existing context keys aligned with `packages/junior/src/chat/logging.ts`.