diff --git a/package.json b/package.json
index 45f0bac..b2180a0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/ai-utils",
-	"version": "0.1.18",
+	"version": "0.1.19",
 	"description": "AI Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",
diff --git a/src/antrhopic.ts b/src/antrhopic.ts
index e55e96d..c0ec2ec 100644
--- a/src/antrhopic.ts
+++ b/src/antrhopic.ts
@@ -39,13 +39,13 @@ export class Anthropic extends LLMProvider {
 			if(history[i].role == 'tool') {
 				const h: any = history[i];
 				history.splice(i, 1,
-					{role: 'assistant', content: [{type: 'tool_use', id: h.id, name: h.name, input: h.args}], timestamp: h.timestamp},
-					{role: 'user', content: [{type: 'tool_result', tool_use_id: h.id, is_error: !!h.error, content:  h.error || h.content}], timestamp: Date.now()}
+					{role: 'assistant', content: [{type: 'tool_use', id: h.id, name: h.name, input: h.args}]},
+					{role: 'user', content: [{type: 'tool_result', tool_use_id: h.id, is_error: !!h.error, content:  h.error || h.content}]}
 				)
 				i++;
 			}
 		}
-		return history;
+		return history.map(({timestamp, ...h}) => h);
 	}
 
 	ask(message: string, options: LLMRequest = {}): AbortablePromise<LLMMessage[]> {
@@ -107,7 +107,7 @@ export class Anthropic extends LLMProvider {
 				loopMessages.push({role: 'assistant', content: resp.content, timestamp: Date.now()});
 				const toolCalls = resp.content.filter((c: any) => c.type === 'tool_use');
 				if(toolCalls.length && !controller.signal.aborted) {
-					history.push({role: 'assistant', content: resp.content, timestamp: Date.now()});
+					history.push({role: 'assistant', content: resp.content});
 					const results = await Promise.all(toolCalls.map(async (toolCall: any) => {
 						const tool = options.tools?.find(findByProp('name', toolCall.name));
 						if(!tool) return {tool_use_id: toolCall.id, is_error: true, content: 'Tool not found'};
@@ -118,9 +118,9 @@ export class Anthropic extends LLMProvider {
 							return {type: 'tool_result', tool_use_id: toolCall.id, is_error: true, content: err?.message || err?.toString() || 'Unknown'};
 						}
 					}));
-					const userMsg = {role: 'user', content: results, timestamp: Date.now()};
+					const userMsg = {role: 'user', content: results};
 					history.push(userMsg);
-					loopMessages.push(userMsg);
+					loopMessages.push({...userMsg, timestamp: Date.now()});
 					requestParams.messages = history;
 				}
 			} while (!controller.signal.aborted && resp.content.some((c: any) => c.type === 'tool_use'));
diff --git a/src/llm.ts b/src/llm.ts
index cd1360f..06af876 100644
--- a/src/llm.ts
+++ b/src/llm.ts
@@ -12,7 +12,7 @@ export type LLMMessage = {
 	/** Message content */
 	content: string | any;
 	/** Timestamp */
-	timestamp: number;
+	timestamp?: number;
 } | {
 	/** Tool call */
 	role: 'tool';
@@ -27,7 +27,7 @@ export type LLMMessage = {
 	/** Tool error */
 	error: undefined | string;
 	/** Timestamp */
-	timestamp: number;
+	timestamp?: number;
 }
 
 export type LLMOptions = {
diff --git a/src/ollama.ts b/src/ollama.ts
index f3e42df..6caeb2c 100644
--- a/src/ollama.ts
+++ b/src/ollama.ts
@@ -31,8 +31,9 @@ export class Ollama extends LLMProvider {
 
 	private fromStandard(history: LLMMessage[]): any[] {
 		return history.map((h: any) => {
-			if(h.role != 'tool') return h;
-			return {role: 'tool', tool_name: h.name, content: h.error || h.content, timestamp: h.timestamp}
+			const {timestamp, ...rest} = h;
+			if(h.role != 'tool') return rest;
+			return {role: 'tool', tool_name: h.name, content: h.error || h.content}
 		});
 	}
 
@@ -90,22 +91,21 @@ export class Ollama extends LLMProvider {
 				}
 
 				loopMessages.push({role: 'assistant', content: resp.message?.content, timestamp: Date.now()});
-
 				if(resp.message?.tool_calls?.length && !controller.signal.aborted) {
-					history.push({...resp.message, timestamp: Date.now()});
+					history.push(resp.message);
 					const results = await Promise.all(resp.message.tool_calls.map(async (toolCall: any) => {
 						const tool = (options.tools || this.ai.options.tools)?.find(findByProp('name', toolCall.function.name));
-						if(!tool) return {role: 'tool', tool_name: toolCall.function.name, content: '{"error": "Tool not found"}', timestamp: Date.now()};
+						if(!tool) return {role: 'tool', tool_name: toolCall.function.name, content: '{"error": "Tool not found"}'};
 						const args = typeof toolCall.function.arguments === 'string' ? JSONAttemptParse(toolCall.function.arguments, {}) : toolCall.function.arguments;
 						try {
 							const result = await tool.fn(args, this.ai);
-							return {role: 'tool', tool_name: toolCall.function.name, args, content: JSONSanitize(result), timestamp: Date.now()};
+							return {role: 'tool', tool_name: toolCall.function.name, args, content: JSONSanitize(result)};
 						} catch (err: any) {
-							return {role: 'tool', tool_name: toolCall.function.name, args, content: JSONSanitize({error: err?.message || err?.toString() || 'Unknown'}), timestamp: Date.now()};
+							return {role: 'tool', tool_name: toolCall.function.name, args, content: JSONSanitize({error: err?.message || err?.toString() || 'Unknown'})};
 						}
 					}));
 					history.push(...results);
-					loopMessages.push(...results);
+					loopMessages.push(...results.map(r => ({...r, timestamp: Date.now()})));
 					requestParams.messages = history;
 				}
 			} while (!controller.signal.aborted && resp.message?.tool_calls?.length);
diff --git a/src/open-ai.ts b/src/open-ai.ts
index 7e1b1a1..4862efc 100644
--- a/src/open-ai.ts
+++ b/src/open-ai.ts
@@ -47,16 +47,15 @@ export class OpenAi extends LLMProvider {
 					content: null,
 					tool_calls: [{ id: h.id, type: 'function', function: { name: h.name, arguments: JSON.stringify(h.args) } }],
 					refusal: null,
-					annotations: [],
-					timestamp: h.timestamp
+					annotations: []
 				}, {
 					role: 'tool',
 					tool_call_id: h.id,
-					content: h.error || h.content,
-					timestamp: Date.now()
+					content: h.error || h.content
 				});
 			} else {
-				result.push(h);
+				const {timestamp, ...rest} = h;
+				result.push(rest);
 			}
 			return result;
 		}, [] as any[]);
@@ -111,20 +110,20 @@ export class OpenAi extends LLMProvider {
 
 				const toolCalls = resp.choices[0].message.tool_calls || [];
 				if(toolCalls.length && !controller.signal.aborted) {
-					history.push({...resp.choices[0].message, timestamp: Date.now()});
+					history.push(resp.choices[0].message);
 					const results = await Promise.all(toolCalls.map(async (toolCall: any) => {
 						const tool = options.tools?.find(findByProp('name', toolCall.function.name));
-						if(!tool) return {role: 'tool', tool_call_id: toolCall.id, content: '{"error": "Tool not found"}', timestamp: Date.now()};
+						if(!tool) return {role: 'tool', tool_call_id: toolCall.id, content: '{"error": "Tool not found"}'};
 						try {
 							const args = JSONAttemptParse(toolCall.function.arguments, {});
 							const result = await tool.fn(args, this.ai);
-							return {role: 'tool', tool_call_id: toolCall.id, content: JSONSanitize(result), timestamp: Date.now()};
+							return {role: 'tool', tool_call_id: toolCall.id, content: JSONSanitize(result)};
 						} catch (err: any) {
-							return {role: 'tool', tool_call_id: toolCall.id, content: JSONSanitize({error: err?.message || err?.toString() || 'Unknown'}), timestamp: Date.now()};
+							return {role: 'tool', tool_call_id: toolCall.id, content: JSONSanitize({error: err?.message || err?.toString() || 'Unknown'})};
 						}
 					}));
 					history.push(...results);
-					loopMessages.push(...results);
+					loopMessages.push(...results.map(r => ({...r, timestamp: Date.now()})));
 					requestParams.messages = history;
 				}
 			} while (!controller.signal.aborted && resp.choices?.[0]?.message?.tool_calls?.length);
@@ -134,7 +133,6 @@ export class OpenAi extends LLMProvider {
 			if(options.stream) options.stream({done: true});
 			res(this.toStandard([...history, {role: 'assistant', content: combinedContent, timestamp: Date.now()}]));
 		});
-
 		return Object.assign(response, {abort: () => controller.abort()});
 	}
 }