diff --git a/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v5.otel-spans.json b/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v5.otel-spans.json
index acf5e50ae..fd5442920 100644
--- a/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v5.otel-spans.json
+++ b/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v5.otel-spans.json
@@ -1,7 +1,7 @@
 [
   {
     "hasParent": false,
-    "name": "ai.generateText.doGenerate"
+    "name": "ai.generateText"
   },
   {
     "hasParent": false,
@@ -9,11 +9,11 @@
   },
   {
     "hasParent": false,
-    "name": "ai.streamText.doStream"
+    "name": "ai.generateText.doGenerate"
   },
   {
     "hasParent": false,
-    "name": "ai.streamText"
+    "name": "ai.generateText.doGenerate"
   },
   {
     "hasParent": false,
@@ -21,7 +21,7 @@
   },
   {
     "hasParent": false,
-    "name": "ai.toolCall"
+    "name": "ai.generateText.doGenerate"
   },
   {
     "hasParent": false,
@@ -29,11 +29,11 @@
   },
   {
     "hasParent": false,
-    "name": "ai.toolCall"
+    "name": "ai.streamText"
   },
   {
     "hasParent": false,
-    "name": "ai.generateText.doGenerate"
+    "name": "ai.streamText.doStream"
   },
   {
     "hasParent": false,
@@ -41,7 +41,7 @@
   },
   {
     "hasParent": false,
-    "name": "ai.generateText.doGenerate"
+    "name": "ai.toolCall"
   },
   {
     "hasParent": false,
@@ -49,6 +49,6 @@
   },
   {
     "hasParent": false,
-    "name": "ai.generateText"
+    "name": "ai.toolCall"
   }
 ]
diff --git a/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v6.otel-spans.json b/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v6.otel-spans.json
index acf5e50ae..fd5442920 100644
--- a/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v6.otel-spans.json
+++ b/e2e/scenarios/ai-sdk-otel-export/__snapshots__/ai-sdk-v6.otel-spans.json
@@ -1,7 +1,7 @@
 [
   {
     "hasParent": false,
-    "name": "ai.generateText.doGenerate"
+    "name": "ai.generateText"
   },
   {
     "hasParent": false,
@@ -9,11 +9,11 @@
   },
   {
     "hasParent": false,
-    "name": "ai.streamText.doStream"
+    "name": "ai.generateText.doGenerate"
   },
   {
     "hasParent": false,
-    "name": "ai.streamText"
+    "name": "ai.generateText.doGenerate"
   },
   {
     "hasParent": false,
@@ -21,7 +21,7 @@
   },
   {
     "hasParent": false,
-    "name": "ai.toolCall"
+    "name": "ai.generateText.doGenerate"
   },
   {
     "hasParent": false,
@@ -29,11 +29,11 @@
   },
   {
     "hasParent": false,
-    "name": "ai.toolCall"
+    "name": "ai.streamText"
   },
   {
     "hasParent": false,
-    "name": "ai.generateText.doGenerate"
+    "name": "ai.streamText.doStream"
   },
   {
     "hasParent": false,
@@ -41,7 +41,7 @@
   },
   {
     "hasParent": false,
-    "name": "ai.generateText.doGenerate"
+    "name": "ai.toolCall"
   },
   {
     "hasParent": false,
@@ -49,6 +49,6 @@
   },
   {
     "hasParent": false,
-    "name": "ai.generateText"
+    "name": "ai.toolCall"
   }
 ]
diff --git a/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts b/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts
index 7b230db44..7d81f5eac 100644
--- a/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts
+++ b/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts
@@ -119,10 +119,17 @@ for (const scenario of scenarios) {
 
           // Snapshot the span names and key structure (not full payloads, since
           // response content and token counts are non-deterministic).
-          const spanSummary = allSpans.map((span) => ({
-            hasParent: !!span.parentSpanId,
-            name: span.name,
-          }));
+          // Sort for determinism — OTel spans arrive in non-deterministic order.
+          const spanSummary = allSpans
+            .map((span) => ({
+              hasParent: !!span.parentSpanId,
+              name: span.name,
+            }))
+            .sort((a, b) =>
+              a.name !== b.name
+                ? a.name.localeCompare(b.name)
+                : Number(a.hasParent) - Number(b.hasParent),
+            );
           await expect(formatJsonFileSnapshot(spanSummary)).toMatchFileSnapshot(
             resolveFileSnapshotPath(
               import.meta.url,
diff --git a/e2e/scenarios/anthropic-instrumentation/scenario.test.ts b/e2e/scenarios/anthropic-instrumentation/scenario.test.ts
index baebbc01d..ce7184bef 100644
--- a/e2e/scenarios/anthropic-instrumentation/scenario.test.ts
+++ b/e2e/scenarios/anthropic-instrumentation/scenario.test.ts
@@ -9,7 +9,7 @@ import { defineAnthropicInstrumentationAssertions } from "./assertions";
 const scenarioDir = await prepareScenarioDir({
   scenarioDir: resolveScenarioDir(import.meta.url),
 });
-const TIMEOUT_MS = 90_000;
+const TIMEOUT_MS = 150_000;
 const anthropicScenarios = await Promise.all(
   [
     {
diff --git a/e2e/scenarios/wrap-langchain-js-traces/__snapshots__/log-payloads.json b/e2e/scenarios/wrap-langchain-js-traces/__snapshots__/log-payloads.json
index 7a1b005aa..b3852b50a 100644
--- a/e2e/scenarios/wrap-langchain-js-traces/__snapshots__/log-payloads.json
+++ b/e2e/scenarios/wrap-langchain-js-traces/__snapshots__/log-payloads.json
@@ -126,10 +126,6 @@
         "ls_model_type": "chat",
         "ls_provider": "openai",
         "ls_temperature": 0,
-        "max_tokens": 16,
-        "model": "gpt-4o-mini",
-        "stream": false,
-        "temperature": 0,
         "versions": {
           "@langchain/core": "<langchain-version>",
           "@langchain/openai": "<langchain-version>"
@@ -704,10 +700,6 @@
         "ls_model_type": "chat",
         "ls_provider": "openai",
         "ls_temperature": 0,
-        "max_tokens": 32,
-        "model": "gpt-4o-mini",
-        "stream": false,
-        "temperature": 0,
         "versions": {
           "@langchain/core": "<langchain-version>",
           "@langchain/openai": "<langchain-version>"
@@ -973,13 +965,6 @@
         "ls_model_type": "chat",
         "ls_provider": "openai",
         "ls_temperature": 0,
-        "max_tokens": 32,
-        "model": "gpt-4o-mini",
-        "stream": true,
-        "stream_options": {
-          "include_usage": true
-        },
-        "temperature": 0,
         "versions": {
           "@langchain/core": "<langchain-version>",
           "@langchain/openai": "<langchain-version>"
@@ -1265,10 +1250,6 @@
         "ls_model_type": "chat",
         "ls_provider": "openai",
         "ls_temperature": 0,
-        "max_tokens": 128,
-        "model": "gpt-4o-mini",
-        "stream": false,
-        "temperature": 0,
         "versions": {
           "@langchain/core": "<langchain-version>",
           "@langchain/openai": "<langchain-version>"
@@ -1606,10 +1587,6 @@
         "ls_model_type": "chat",
         "ls_provider": "openai",
         "ls_temperature": 0,
-        "max_tokens": 128,
-        "model": "gpt-4o-mini",
-        "stream": false,
-        "temperature": 0,
         "versions": {
           "@langchain/core": "<langchain-version>",
           "@langchain/openai": "<langchain-version>"
@@ -1962,10 +1939,6 @@
         "ls_model_type": "chat",
         "ls_provider": "openai",
         "ls_temperature": 0,
-        "max_tokens": 128,
-        "model": "gpt-4o-mini",
-        "stream": false,
-        "temperature": 0,
         "versions": {
           "@langchain/core": "<langchain-version>",
           "@langchain/openai": "<langchain-version>"
diff --git a/e2e/scenarios/wrap-langchain-js-traces/assertions.ts b/e2e/scenarios/wrap-langchain-js-traces/assertions.ts
index ff6415220..f5e1ed7dd 100644
--- a/e2e/scenarios/wrap-langchain-js-traces/assertions.ts
+++ b/e2e/scenarios/wrap-langchain-js-traces/assertions.ts
@@ -137,6 +137,17 @@ function normalizeToolCallIds(obj: unknown): void {
   }
 }
 
+// Fields that older @langchain/openai included in the ls_* metadata block but
+// newer versions removed. Normalize them out so the snapshot is stable across
+// both locked and canary (latest) langchain versions.
+const LANGCHAIN_LS_VOLATILE_KEYS = new Set([
+  "max_tokens",
+  "model",
+  "stream",
+  "stream_options",
+  "temperature",
+]);
+
 function normalizeLangchainVersions(obj: unknown): void {
   if (!obj || typeof obj !== "object") return;
 
@@ -161,6 +172,15 @@ function normalizeLangchainVersions(obj: unknown): void {
     }
   }
 
+  // If this object is the ls_* metadata block (identified by the presence of
+  // any `ls_` key), remove volatile keys that newer langchain drops.
+  const hasLsKey = Object.keys(record).some((k) => k.startsWith("ls_"));
+  if (hasLsKey) {
+    for (const key of LANGCHAIN_LS_VOLATILE_KEYS) {
+      delete record[key];
+    }
+  }
+
   for (const value of Object.values(record)) {
     if (typeof value === "object" && value !== null) {
       normalizeLangchainVersions(value);