diff --git a/src/core/assistant-message/AssistantMessageParser.ts b/src/core/assistant-message/AssistantMessageParser.ts
index 364ec603f2..1cc7849a2b 100644
--- a/src/core/assistant-message/AssistantMessageParser.ts
+++ b/src/core/assistant-message/AssistantMessageParser.ts
@@ -14,8 +14,8 @@ export class AssistantMessageParser {
 	private currentToolUseStartIndex = 0
 	private currentParamName: ToolParamName | undefined = undefined
 	private currentParamValueStartIndex = 0
-	private readonly MAX_ACCUMULATOR_SIZE = 1024 * 1024 // 1MB limit
-	private readonly MAX_PARAM_LENGTH = 1024 * 100 // 100KB per parameter limit
+	private readonly MAX_ACCUMULATOR_SIZE = 10 * 1024 * 1024 // 10MB limit to accommodate browser screenshots
+	private readonly MAX_PARAM_LENGTH = 5 * 1024 * 1024 // 5MB per parameter limit for large screenshots
 	private accumulator = ""
 
 	/**
diff --git a/src/core/assistant-message/__tests__/AssistantMessageParser.spec.ts b/src/core/assistant-message/__tests__/AssistantMessageParser.spec.ts
index 6b7c3915ee..dc5c913c0e 100644
--- a/src/core/assistant-message/__tests__/AssistantMessageParser.spec.ts
+++ b/src/core/assistant-message/__tests__/AssistantMessageParser.spec.ts
@@ -325,8 +325,8 @@ describe("AssistantMessageParser (streaming)", () => {
 
 	describe("size limit handling", () => {
 		it("should throw an error when MAX_ACCUMULATOR_SIZE is exceeded", () => {
-			// Create a message that exceeds 1MB (MAX_ACCUMULATOR_SIZE)
-			const largeMessage = "x".repeat(1024 * 1024 + 1) // 1MB + 1 byte
+			// Create a message that exceeds 10MB (MAX_ACCUMULATOR_SIZE)
+			const largeMessage = "x".repeat(10 * 1024 * 1024 + 1) // 10MB + 1 byte
 
 			expect(() => {
 				parser.processChunk(largeMessage)