Max tokens fixes

e2e/runtime_test.go

@@ -32,7 +32,7 @@ func TestRuntime_OpenAI_Basic(t *testing.T) {
 
 	response := sess.GetLastAssistantMessageContent()
 	assert.Equal(t, "2 + 2 equals 4.", response)
-	assert.Equal(t, "Basic Math Question", sess.Title)
+	assert.Equal(t, "Simple Math: Addition of 2 and 2", sess.Title)
 }
 
 func TestRuntime_Mistral_Basic(t *testing.T) {

e2e/testdata/cassettes/TestExec_Anthropic.yaml

@@ -1,43 +1,47 @@
 ---
 version: 2
 interactions:
-- id: 0
-  request:
-    proto: HTTP/1.1
-    proto_major: 1
-    proto_minor: 1
-    content_length: 0
-    host: api.anthropic.com
-    body: "{\"messages\":[{\"content\":[{\"text\":\"What's 2+2?\",\"type\":\"text\"}],\"role\":\"user\"}],\"model\":\"claude-sonnet-4-0\",\"system\":[{\"text\":\"You are a knowledgeable assistant that helps users with various tasks.\\nBe helpful, accurate, and concise in your responses.\",\"cache_control\":{\"type\":\"ephemeral\"},\"type\":\"text\"}]}"
-    url: https://api.anthropic.com/v1/messages/count_tokens
-    method: POST
-  response:
-    proto: HTTP/2.0
-    proto_major: 2
-    proto_minor: 0
-    content_length: 19
-    body: "{\"input_tokens\":42}"
-    headers: {}
-    status: 200 OK
-    code: 200
-    duration: 192.898375ms
-- id: 1
-  request:
-    proto: HTTP/1.1
-    proto_major: 1
-    proto_minor: 1
-    content_length: 0
-    host: api.anthropic.com
-    body: "{\"max_tokens\":8192,\"messages\":[{\"content\":[{\"text\":\"What's 2+2?\",\"type\":\"text\"}],\"role\":\"user\"}],\"model\":\"claude-sonnet-4-0\",\"system\":[{\"text\":\"You are a knowledgeable assistant that helps users with various tasks.\\nBe helpful, accurate, and concise in your responses.\",\"cache_control\":{\"type\":\"ephemeral\"},\"type\":\"text\"}],\"tools\":[],\"stream\":true}"
-    url: https://api.anthropic.com/v1/messages
-    method: POST
-  response:
-    proto: HTTP/2.0
-    proto_major: 2
-    proto_minor: 0
-    content_length: -1
-    body: "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-sonnet-4-20250514\",\"id\":\"msg_0175jbuqJKy5FyijdH5fbvaW\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"usage\":{\"input_tokens\":42,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":1,\"service_tier\":\"standard\"}}           }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}          }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"2 \"}   }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"+ 2 = 4\"}  }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0        }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null},\"usage\":{\"input_tokens\":42,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":13}          }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"    }\n\n"
-    headers: {}
-    status: 200 OK
-    code: 200
-    duration: 2.088045083s
+    - id: 0
+      request:
+        proto: HTTP/1.1
+        proto_major: 1
+        proto_minor: 1
+        content_length: 0
+        host: api.anthropic.com
+        body: '{"max_tokens":64000,"messages":[{"content":[{"text":"What''s 2+2?","type":"text"}],"role":"user"}],"model":"claude-sonnet-4-0","system":[{"text":"You are a knowledgeable assistant that helps users with various tasks.\nBe helpful, accurate, and concise in your responses.","cache_control":{"type":"ephemeral"},"type":"text"}],"tools":[],"stream":true}'
+        url: https://api.anthropic.com/v1/messages
+        method: POST
+      response:
+        proto: HTTP/2.0
+        proto_major: 2
+        proto_minor: 0
+        content_length: -1
+        body: |+
+            event: message_start
+            data: {"type":"message_start","message":{"model":"claude-sonnet-4-20250514","id":"msg_01MyjDL5YUjXGFqCCCofeFkK","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":42,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard"}}      }
+
+            event: content_block_start
+            data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}            }
+
+            event: content_block_delta
+            data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"2 "}       }
+
+            event: ping
+            data: {"type": "ping"}
+
+            event: content_block_delta
+            data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"+ 2 = 4"}    }
+
+            event: content_block_stop
+            data: {"type":"content_block_stop","index":0      }
+
+            event: message_delta
+            data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":42,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":13}               }
+
+            event: message_stop
+            data: {"type":"message_stop"             }
+
+        headers: {}
+        status: 200 OK
+        code: 200
+        duration: 2.000933084s