this.model = model;
        return this;
    }

    /**
     * Gets the maximum tokens for the response.
     *
     * @return the maximum tokens
     */
    public Integer getMaxTokens() {
        return maxTokens;
    }

    /**
     * Sets the maximum tokens for the response.
     *
     * @param maxTokens the maximum tokens
     * @return this request for method chaining

        final LlmChatRequest request = new LlmChatRequest();
        assertNotNull(request.getMessages());
        assertTrue(request.getMessages().isEmpty());
        assertNull(request.getModel());
        assertNull(request.getMaxTokens());
        assertNull(request.getTemperature());
        assertFalse(request.isStream());
    }

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