final LlmChatRequest result = request.setModel("gpt-4");

        assertSame(request, result);
        assertEquals("gpt-4", request.getModel());
    }

    @Test
    public void test_setMaxTokens() {
        final LlmChatRequest request = new LlmChatRequest();

        final LlmChatRequest result = request.setMaxTokens(1000);

        assertSame(request, result);