diff --git a/models/spring-ai-bedrock-converse/src/main/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModel.java b/models/spring-ai-bedrock-converse/src/main/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModel.java
index 49df9ac777..225eedeed0 100644
--- a/models/spring-ai-bedrock-converse/src/main/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModel.java
+++ b/models/spring-ai-bedrock-converse/src/main/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModel.java
@@ -288,7 +288,12 @@ ConverseRequest createRequest(Prompt prompt) {
 				List<ContentBlock> contents = new ArrayList<>();
 				if (message instanceof UserMessage) {
 					var userMessage = (UserMessage) message;
-					contents.add(ContentBlock.fromText(userMessage.getText()));
+					// The Converse API rejects empty text content blocks, so only send
+					// the text when there is any. A user message may legitimately carry
+					// media only (gh-6695).
+					if (StringUtils.hasText(userMessage.getText())) {
+						contents.add(ContentBlock.fromText(userMessage.getText()));
+					}
 
 					if (!CollectionUtils.isEmpty(userMessage.getMedia())) {
 						List<ContentBlock> mediaContent = userMessage.getMedia()
diff --git a/models/spring-ai-bedrock-converse/src/test/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModelTest.java b/models/spring-ai-bedrock-converse/src/test/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModelTest.java
index 377bc76fea..353ba28121 100644
--- a/models/spring-ai-bedrock-converse/src/test/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModelTest.java
+++ b/models/spring-ai-bedrock-converse/src/test/java/org/springframework/ai/bedrock/converse/BedrockProxyChatModelTest.java
@@ -415,6 +415,58 @@ void shouldApplyCacheTtlOnToolsCachePoint() {
 		assertThat(tools.get(1).cachePoint().ttlAsString()).isEqualTo("1h");
 	}
 
+	// -------------------------------------------------------------------------
+	// Empty user message text (gh-6695)
+	// -------------------------------------------------------------------------
+
+	@Test
+	void mediaOnlyUserMessageOmitsEmptyTextContentBlock() {
+		BedrockProxyChatModel model = newModel();
+
+		Prompt prompt = new Prompt(List.of(UserMessage.builder().text("").media(pngMedia()).build()),
+				BedrockChatOptions.builder().build());
+
+		List<ContentBlock> contents = model.createRequest(prompt).messages().get(0).content();
+
+		assertThat(contents).hasSize(1);
+		assertThat(contents.get(0).image()).isNotNull();
+		assertThat(contents).noneMatch(content -> content.text() != null);
+	}
+
+	@Test
+	void blankUserMessageTextOmitsEmptyTextContentBlock() {
+		BedrockProxyChatModel model = newModel();
+
+		Prompt prompt = new Prompt(List.of(UserMessage.builder().text("   \n\t").media(pngMedia()).build()),
+				BedrockChatOptions.builder().build());
+
+		List<ContentBlock> contents = model.createRequest(prompt).messages().get(0).content();
+
+		assertThat(contents).hasSize(1);
+		assertThat(contents.get(0).image()).isNotNull();
+	}
+
+	@Test
+	void userMessageWithTextAndMediaKeepsBothContentBlocks() {
+		BedrockProxyChatModel model = newModel();
+
+		Prompt prompt = new Prompt(List.of(UserMessage.builder().text("Describe the image").media(pngMedia()).build()),
+				BedrockChatOptions.builder().build());
+
+		List<ContentBlock> contents = model.createRequest(prompt).messages().get(0).content();
+
+		assertThat(contents).hasSize(2);
+		assertThat(contents.get(0).text()).isEqualTo("Describe the image");
+		assertThat(contents.get(1).image()).isNotNull();
+	}
+
+	private static Media pngMedia() {
+		return Media.builder()
+			.mimeType(MimeType.valueOf("image/png"))
+			.data(new byte[] { (byte) 0x89, 'P', 'N', 'G' })
+			.build();
+	}
+
 	public record WeatherRequest(String location, String unit) {
 	}